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23161060 = 22513229389
BaseRepresentation
bin101100001011…
…0100011100100
31121120201000001
41120112203210
521412123220
62144231044
7400602646
oct130264344
947521001
1023161060
111208a27a
12790b484
134a4c190
14310c896
15207780a
hex16168e4

23161060 has 48 divisors (see below), whose sum is σ = 52743600. Its totient is φ = 8492544.

The previous prime is 23161051. The next prime is 23161079. The reversal of 23161060 is 6016132.

It can be written as a sum of positive squares in 8 ways, for example, as 484416 + 22676644 = 696^2 + 4762^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 59346 + ... + 59734.

It is an arithmetic number, because the mean of its divisors is an integer number (1098825).

Almost surely, 223161060 is an apocalyptic number.

23161060 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 23161060, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26371800).

23161060 is an abundant number, since it is smaller than the sum of its proper divisors (29582540).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

23161060 is a wasteful number, since it uses less digits than its factorization.

23161060 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 640 (or 638 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 19.

The square root of 23161060 is about 4812.5938951879. The cubic root of 23161060 is about 285.0489707581.

Adding to 23161060 its reverse (6016132), we get a palindrome (29177192).

The spelling of 23161060 in words is "twenty-three million, one hundred sixty-one thousand, sixty".

Divisors: 1 2 4 5 10 13 20 26 52 65 130 229 260 389 458 778 916 1145 1556 1945 2290 2977 3890 4580 5057 5954 7780 10114 11908 14885 20228 25285 29770 50570 59540 89081 101140 178162 356324 445405 890810 1158053 1781620 2316106 4632212 5790265 11580530 23161060