23155297 has 4 divisors (see below), whose sum is σ = 25260336.
Its totient is φ = 21050260.
The previous prime is 23155289. The next prime is 23155313. The reversal of 23155297 is 79255132.
It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.
It is not a de Polignac number, because 23155297 - 23 = 23155289 is a prime.
It is a Duffinian number.
It is not an unprimeable number, because it can be changed into a prime (23155217) 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, 1052503 + ... + 1052524.
It is an arithmetic number, because the mean of its divisors is an integer number (6315084).
Almost surely, 223155297 is an apocalyptic number.
It is an amenable number.
23155297 is a deficient number, since it is larger than the sum of its proper divisors (2105039).
23155297 is a wasteful number, since it uses less digits than its factorization.
23155297 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 2105038.
The product of its digits is 18900, while the sum is 34.
The square root of 23155297 is about 4811.9951163732.
The cubic root of 23155297 is about 285.0253265684.
The spelling of 23155297 in words is "twenty-three million, one hundred fifty-five thousand, two hundred ninety-seven".