23531213555 has 16 divisors (see below), whose sum is σ = 29153086464. Its totient is φ = 18214748640.

The previous prime is 23531213521. The next prime is 23531213567. The reversal of 23531213555 is 55531213532.

It is not a de Polignac number, because 23531213555 - 2¹⁴ = 23531197171 is a prime.

It is a super-2 number, since 2×23531213555² (a number of 22 digits) contains 22 as substring.

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, 1767032 + ... + 1780298.

It is an arithmetic number, because the mean of its divisors is an integer number (1822067904).

Almost surely, 2^23531213555 is an apocalyptic number.

23531213555 is a deficient number, since it is larger than the sum of its proper divisors (5621872909).

23531213555 is a wasteful number, since it uses less digits than its factorization.

23531213555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24746.

The product of its digits is 67500, while the sum is 35.

The spelling of 23531213555 in words is "twenty-three billion, five hundred thirty-one million, two hundred thirteen thousand, five hundred fifty-five".