531204651065 has 64 divisors (see below), whose sum is σ = 710252686080. Its totient is φ = 378183843840.

The previous prime is 531204651049. The next prime is 531204651067. The reversal of 531204651065 is 560156402135.

It is not a de Polignac number, because 531204651065 - 2⁴ = 531204651049 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (531204651067) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 214453607 + ... + 214456083.

It is an arithmetic number, because the mean of its divisors is an integer number (11097698220).

Almost surely, 2^531204651065 is an apocalyptic number.

531204651065 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

531204651065 is a deficient number, since it is larger than the sum of its proper divisors (179048035015).

531204651065 is a wasteful number, since it uses less digits than its factorization.

531204651065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3002.

The product of its (nonzero) digits is 108000, while the sum is 38.

The spelling of 531204651065 in words is "five hundred thirty-one billion, two hundred four million, six hundred fifty-one thousand, sixty-five".