23087515 has 16 divisors (see below), whose sum is σ = 31539456. Its totient is φ = 16060000.

The previous prime is 23087503. The next prime is 23087531. The reversal of 23087515 is 51578032.

It is not a de Polignac number, because 23087515 - 2¹¹ = 23085467 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7861 + ... + 10390.

It is an arithmetic number, because the mean of its divisors is an integer number (1971216).

Almost surely, 2^23087515 is an apocalyptic number.

23087515 is a deficient number, since it is larger than the sum of its proper divisors (8451941).

23087515 is a wasteful number, since it uses less digits than its factorization.

23087515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18290.

The product of its (nonzero) digits is 8400, while the sum is 31.

The square root of 23087515 is about 4804.9469299879. The cubic root of 23087515 is about 284.7469385942.

The spelling of 23087515 in words is "twenty-three million, eighty-seven thousand, five hundred fifteen".