531440352120 has 128 divisors (see below), whose sum is σ = 1664254463040. Its totient is φ = 135626711040.

The previous prime is 531440352109. The next prime is 531440352161. The reversal of 531440352120 is 21253044135.

It is a super-2 number, since 2×531440352120² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 710257 + ... + 1251936.

Almost surely, 2^531440352120 is an apocalyptic number.

It is an amenable number.

531440352120 is an abundant number, since it is smaller than the sum of its proper divisors (1132814110920).

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

531440352120 is a wasteful number, since it uses less digits than its factorization.

531440352120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1962305 (or 1962301 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 30.

Adding to 531440352120 its reverse (21253044135), we get a palindrome (552693396255).

The spelling of 531440352120 in words is "five hundred thirty-one billion, four hundred forty million, three hundred fifty-two thousand, one hundred twenty".