531564540 has 48 divisors (see below), whose sum is σ = 1602873888. Its totient is φ = 130846464.

The previous prime is 531564529. The next prime is 531564541. The reversal of 531564540 is 45465135.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (531564541) 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, 339967 + ... + 341526.

It is an arithmetic number, because the mean of its divisors is an integer number (33393206).

Almost surely, 2^531564540 is an apocalyptic number.

It is an amenable number.

531564540 is an abundant number, since it is smaller than the sum of its proper divisors (1071309348).

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

531564540 is a wasteful number, since it uses less digits than its factorization.

531564540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 681518 (or 681516 counting only the distinct ones).

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

The square root of 531564540 is about 23055.6834641700. The cubic root of 531564540 is about 810.0627599596.

The spelling of 531564540 in words is "five hundred thirty-one million, five hundred sixty-four thousand, five hundred forty".