23155261 has 8 divisors (see below), whose sum is σ = 23418720. Its totient is φ = 22893648.

The previous prime is 23155247. The next prime is 23155271. The reversal of 23155261 is 16255132.

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 23155261 - 2¹⁵ = 23122493 is a prime.

It is a super-2 number, since 2×23155261² = 1072332223956242, 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 (23155271) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 49350 + ... + 49816.

It is an arithmetic number, because the mean of its divisors is an integer number (2927340).

Almost surely, 2^23155261 is an apocalyptic number.

It is an amenable number.

23155261 is a deficient number, since it is larger than the sum of its proper divisors (263459).

23155261 is a wasteful number, since it uses less digits than its factorization.

23155261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 923.

The product of its digits is 1800, while the sum is 25.

The square root of 23155261 is about 4811.9913757196. The cubic root of 23155261 is about 285.0251788568.

The spelling of 23155261 in words is "twenty-three million, one hundred fifty-five thousand, two hundred sixty-one".