23251915 has 16 divisors (see below), whose sum is σ = 29502720. Its totient is φ = 17543520.

The previous prime is 23251913. The next prime is 23251931. The reversal of 23251915 is 51915232.

23251915 = 251² + 252² + ... + 440².

It is not a de Polignac number, because 23251915 - 2¹ = 23251913 is a prime.

It is not an unprimeable number, because it can be changed into a prime (23251913) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29152 + ... + 29938.

It is an arithmetic number, because the mean of its divisors is an integer number (1843920).

Almost surely, 2^23251915 is an apocalyptic number.

23251915 is a deficient number, since it is larger than the sum of its proper divisors (6250805).

23251915 is a wasteful number, since it uses less digits than its factorization.

23251915 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1122.

The product of its digits is 2700, while the sum is 28.

The square root of 23251915 is about 4822.0239526572. The cubic root of 23251915 is about 285.4212095346.

The spelling of 23251915 in words is "twenty-three million, two hundred fifty-one thousand, nine hundred fifteen".