531105115120 has 80 divisors (see below), whose sum is σ = 1317436848288. Its totient is φ = 198419087360.

The previous prime is 531105115111. The next prime is 531105115133. The reversal of 531105115120 is 21511501135.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×531105115120² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1312369 + ... + 1668688.

Almost surely, 2^531105115120 is an apocalyptic number.

It is an amenable number.

531105115120 is an abundant number, since it is smaller than the sum of its proper divisors (786331733168).

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

531105115120 is a wasteful number, since it uses less digits than its factorization.

531105115120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2981218 (or 2981212 counting only the distinct ones).

The product of its (nonzero) digits is 750, while the sum is 25.

Adding to 531105115120 its reverse (21511501135), we get a palindrome (552616616255).

The spelling of 531105115120 in words is "five hundred thirty-one billion, one hundred five million, one hundred fifteen thousand, one hundred twenty".