531315526161 has 32 divisors (see below), whose sum is σ = 846078824448. Its totient is φ = 290238641280.

The previous prime is 531315526139. The next prime is 531315526163. The reversal of 531315526161 is 161625513135.

It is not a de Polignac number, because 531315526161 - 2¹⁸ = 531315264017 is a prime.

It is not an unprimeable number, because it can be changed into a prime (531315526163) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6217020 + ... + 6301901.

It is an arithmetic number, because the mean of its divisors is an integer number (26439963264).

Almost surely, 2^531315526161 is an apocalyptic number.

It is an amenable number.

531315526161 is a deficient number, since it is larger than the sum of its proper divisors (314763298287).

531315526161 is a wasteful number, since it uses less digits than its factorization.

531315526161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12519021.

The product of its digits is 81000, while the sum is 39.

The spelling of 531315526161 in words is "five hundred thirty-one billion, three hundred fifteen million, five hundred twenty-six thousand, one hundred sixty-one".