531557012 has 24 divisors (see below), whose sum is σ = 1066485504. Its totient is φ = 227087712.

The previous prime is 531557009. The next prime is 531557017. The reversal of 531557012 is 210755135.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (531557017) 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, 21068 + ... + 38819.

It is an arithmetic number, because the mean of its divisors is an integer number (44436896).

Almost surely, 2^531557012 is an apocalyptic number.

It is an amenable number.

531557012 is an abundant number, since it is smaller than the sum of its proper divisors (534928492).

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

531557012 is a wasteful number, since it uses less digits than its factorization.

531557012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60215 (or 60213 counting only the distinct ones).

The product of its (nonzero) digits is 5250, while the sum is 29.

The square root of 531557012 is about 23055.5202066663. The cubic root of 531557012 is about 810.0589359139.

The spelling of 531557012 in words is "five hundred thirty-one million, five hundred fifty-seven thousand, twelve".