23157715 has 16 divisors (see below), whose sum is σ = 32209920. Its totient is φ = 15654240.

The previous prime is 23157703. The next prime is 23157721. The reversal of 23157715 is 51775132.

It is a de Polignac number, because none of the positive numbers 2^k-23157715 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2175 + ... + 7144.

It is an arithmetic number, because the mean of its divisors is an integer number (2013120).

Almost surely, 2^23157715 is an apocalyptic number.

23157715 is a deficient number, since it is larger than the sum of its proper divisors (9052205).

23157715 is an equidigital number, since it uses as much as digits as its factorization.

23157715 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9402.

The product of its digits is 7350, while the sum is 31.

The square root of 23157715 is about 4812.2463569522. The cubic root of 23157715 is about 285.0352475129.

The spelling of 23157715 in words is "twenty-three million, one hundred fifty-seven thousand, seven hundred fifteen".