23105531215 has 24 divisors (see below), whose sum is σ = 31719240000. Its totient is φ = 16058853888.

The previous prime is 23105531179. The next prime is 23105531219. The reversal of 23105531215 is 51213550132.

It is not a de Polignac number, because 23105531215 - 2⁷ = 23105531087 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23105531219) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 596215 + ... + 633784.

It is an arithmetic number, because the mean of its divisors is an integer number (1321635000).

Almost surely, 2^23105531215 is an apocalyptic number.

23105531215 is a deficient number, since it is larger than the sum of its proper divisors (8613708785).

23105531215 is a wasteful number, since it uses less digits than its factorization.

23105531215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1230051 (or 1230034 counting only the distinct ones).

The product of its (nonzero) digits is 4500, while the sum is 28.

The spelling of 23105531215 in words is "twenty-three billion, one hundred five million, five hundred thirty-one thousand, two hundred fifteen".