531981375263 has 16 divisors (see below), whose sum is σ = 579504534336. Its totient is φ = 485418424320.

The previous prime is 531981375251. The next prime is 531981375283. The reversal of 531981375263 is 362573189135.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 531981375263 - 2⁸ = 531981375007 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (531981375283) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 389183 + ... + 1102463.

It is an arithmetic number, because the mean of its divisors is an integer number (36219033396).

Almost surely, 2^531981375263 is an apocalyptic number.

531981375263 is a deficient number, since it is larger than the sum of its proper divisors (47523159073).

531981375263 is a wasteful number, since it uses less digits than its factorization.

531981375263 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 713954.

The product of its digits is 4082400, while the sum is 53.

The spelling of 531981375263 in words is "five hundred thirty-one billion, nine hundred eighty-one million, three hundred seventy-five thousand, two hundred sixty-three".