531157356 has 18 divisors (see below), whose sum is σ = 1342647852. Its totient is φ = 177052440.

The previous prime is 531157349. The next prime is 531157381. The reversal of 531157356 is 653751135.

531157356 is a `hidden beast` number, since 5 + 31 + 1 + 573 + 56 = 666.

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 14754371 = 531157356 / (5 + 3 + 1 + 1 + 5 + 7 + 3 + 5 + 6).

It is a self number, because there is not a number n which added to its sum of digits gives 531157356.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7377150 + ... + 7377221.

Almost surely, 2^531157356 is an apocalyptic number.

It is an amenable number.

531157356 is an abundant number, since it is smaller than the sum of its proper divisors (811490496).

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

531157356 is a wasteful number, since it uses less digits than its factorization.

531157356 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14754381 (or 14754376 counting only the distinct ones).

The product of its digits is 47250, while the sum is 36.

The square root of 531157356 is about 23046.8513250726. The cubic root of 531157356 is about 809.8558682733.

The spelling of 531157356 in words is "five hundred thirty-one million, one hundred fifty-seven thousand, three hundred fifty-six".