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23103031 = 719173707
BaseRepresentation
bin101100000100…
…0011000110111
31121110202101211
41120020120313
521403244111
62143102251
7400241530
oct130103067
947422354
1023103031
111204a716
1278a1987
134a2b943
1430d5687
152065521
hex1608637

23103031 has 8 divisors (see below), whose sum is σ = 27793280. Its totient is φ = 18760248.

The previous prime is 23103019. The next prime is 23103037. The reversal of 23103031 is 13030132.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 23103031 - 213 = 23094839 is a prime.

It is a super-2 number, since 2×231030312 = 1067500082773922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23103037) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 86721 + ... + 86986.

It is an arithmetic number, because the mean of its divisors is an integer number (3474160).

Almost surely, 223103031 is an apocalyptic number.

23103031 is a deficient number, since it is larger than the sum of its proper divisors (4690249).

23103031 is a wasteful number, since it uses less digits than its factorization.

23103031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 173733.

The product of its (nonzero) digits is 54, while the sum is 13.

The square root of 23103031 is about 4806.5612447986. The cubic root of 23103031 is about 284.8107125160.

Adding to 23103031 its reverse (13030132), we get a palindrome (36133163).

The spelling of 23103031 in words is "twenty-three million, one hundred three thousand, thirty-one".

Divisors: 1 7 19 133 173707 1215949 3300433 23103031