531142872 has 64 divisors (see below), whose sum is σ = 1505280000. Its totient is φ = 154825344.

The previous prime is 531142867. The next prime is 531142877. The reversal of 531142872 is 278241135.

It is an interprime number because it is at equal distance from previous prime (531142867) and next prime (531142877).

It is a super-2 number, since 2×531142872² = 564225500952816768, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (531142877) 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, 38872 + ... + 50727.

It is an arithmetic number, because the mean of its divisors is an integer number (23520000).

Almost surely, 2^531142872 is an apocalyptic number.

531142872 is a gapful number since it is divisible by the number (52) formed by its first and last digit.

It is an amenable number.

531142872 is an abundant number, since it is smaller than the sum of its proper divisors (974137128).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

531142872 is a wasteful number, since it uses less digits than its factorization.

531142872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89640 (or 89636 counting only the distinct ones).

The product of its digits is 13440, while the sum is 33.

The square root of 531142872 is about 23046.5370934551. The cubic root of 531142872 is about 809.8485069525.

The spelling of 531142872 in words is "five hundred thirty-one million, one hundred forty-two thousand, eight hundred seventy-two".