531513136 has 40 divisors (see below), whose sum is σ = 1283917824. Its totient is φ = 207082560.

The previous prime is 531513133. The next prime is 531513181. The reversal of 531513136 is 631315135.

531513136 = 4060² + 4061² + ... + 4091².

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is not an unprimeable number, because it can be changed into a prime (531513133) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 214480 + ... + 216943.

Almost surely, 2^531513136 is an apocalyptic number.

531513136 is a gapful number since it is divisible by the number (56) formed by its first and last digit.

It is an amenable number.

531513136 is an abundant number, since it is smaller than the sum of its proper divisors (752404688).

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

531513136 is a wasteful number, since it uses less digits than its factorization.

531513136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 431449 (or 431443 counting only the distinct ones).

The product of its digits is 4050, while the sum is 28.

The square root of 531513136 is about 23054.5686578604. The cubic root of 531513136 is about 810.0366472268.

The spelling of 531513136 in words is "five hundred thirty-one million, five hundred thirteen thousand, one hundred thirty-six".