231516213274415 has 16 divisors (see below), whose sum is σ = 278048088391680. Its totient is φ = 185060560880160.

The previous prime is 231516213274397. The next prime is 231516213274553. The reversal of 231516213274415 is 514472312615132.

It is not a de Polignac number, because 231516213274415 - 2³⁴ = 231499033405231 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 231516213274415.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 157654100 + ... + 159115830.

It is an arithmetic number, because the mean of its divisors is an integer number (17378005524480).

Almost surely, 2^{231516213274415} is an apocalyptic number.

231516213274415 is a deficient number, since it is larger than the sum of its proper divisors (46531875117265).

231516213274415 is a wasteful number, since it uses less digits than its factorization.

231516213274415 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1487782.

The product of its digits is 1209600, while the sum is 47.

Adding to 231516213274415 its reverse (514472312615132), we get a palindrome (745988525889547).

The spelling of 231516213274415 in words is "two hundred thirty-one trillion, five hundred sixteen billion, two hundred thirteen million, two hundred seventy-four thousand, four hundred fifteen".