531513240225 has 96 divisors (see below), whose sum is σ = 973292848128. Its totient is φ = 253777440000.

The previous prime is 531513240191. The next prime is 531513240239. The reversal of 531513240225 is 522042315135.

It is not a de Polignac number, because 531513240225 - 2¹² = 531513236129 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 55114254 + ... + 55123896.

It is an arithmetic number, because the mean of its divisors is an integer number (10138467168).

Almost surely, 2^531513240225 is an apocalyptic number.

531513240225 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

531513240225 is a deficient number, since it is larger than the sum of its proper divisors (441779607903).

531513240225 is a wasteful number, since it uses less digits than its factorization.

531513240225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10679 (or 10674 counting only the distinct ones).

The product of its (nonzero) digits is 36000, while the sum is 33.

The spelling of 531513240225 in words is "five hundred thirty-one billion, five hundred thirteen million, two hundred forty thousand, two hundred twenty-five".