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230170261 = 1613142697
BaseRepresentation
bin11011011100000…
…01111010010101
3121001002212020111
431232001322111
5432410422021
634501203021
75463262216
oct1556017225
9531085214
10230170261
11108a1a362
1265100471
13388bb929
14227d740d
15153188e1
hexdb81e95

230170261 has 4 divisors (see below), whose sum is σ = 230314572. Its totient is φ = 230025952.

The previous prime is 230170253. The next prime is 230170267. The reversal of 230170261 is 162071032.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 156725361 + 73444900 = 12519^2 + 8570^2 .

It is a cyclic number.

It is not a de Polignac number, because 230170261 - 23 = 230170253 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (230170267) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 69736 + ... + 72961.

It is an arithmetic number, because the mean of its divisors is an integer number (57578643).

Almost surely, 2230170261 is an apocalyptic number.

It is an amenable number.

230170261 is a deficient number, since it is larger than the sum of its proper divisors (144311).

230170261 is a wasteful number, since it uses less digits than its factorization.

230170261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144310.

The product of its (nonzero) digits is 504, while the sum is 22.

The square root of 230170261 is about 15171.3631885866. The cubic root of 230170261 is about 612.8437152314.

The spelling of 230170261 in words is "two hundred thirty million, one hundred seventy thousand, two hundred sixty-one".

Divisors: 1 1613 142697 230170261