53131531515 has 16 divisors (see below), whose sum is σ = 85034066208. Its totient is φ = 28328944896.

The previous prime is 53131531489. The next prime is 53131531567. The reversal of 53131531515 is 51513513135.

It is not a de Polignac number, because 53131531515 - 2¹¹ = 53131529467 is a prime.

It is a super-2 number, since 2×53131531515² (a number of 22 digits) contains 22 as substring.

It is a nude number because it is divisible by every one of its digits.

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, 435994 + ... + 544383.

It is an arithmetic number, because the mean of its divisors is an integer number (5314629138).

Almost surely, 2^53131531515 is an apocalyptic number.

53131531515 is a deficient number, since it is larger than the sum of its proper divisors (31902534693).

53131531515 is a wasteful number, since it uses less digits than its factorization.

53131531515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 983998.

The product of its digits is 16875, while the sum is 33.

The spelling of 53131531515 in words is "fifty-three billion, one hundred thirty-one million, five hundred thirty-one thousand, five hundred fifteen".