252856157531 has 4 divisors (see below), whose sum is σ = 252862855392. Its totient is φ = 252849459672.

The previous prime is 252856157509. The next prime is 252856157549. The reversal of 252856157531 is 135751658252.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 252856157531 - 2²⁶ = 252789048667 is a prime.

It is a super-2 number, since 2×252856157531² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 252856157531.

It is not an unprimeable number, because it can be changed into a prime (252856157431) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3291980 + ... + 3367913.

It is an arithmetic number, because the mean of its divisors is an integer number (63215713848).

Almost surely, 2^252856157531 is an apocalyptic number.

252856157531 is a deficient number, since it is larger than the sum of its proper divisors (6697861).

252856157531 is an equidigital number, since it uses as much as digits as its factorization.

252856157531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6697860.

The product of its digits is 2520000, while the sum is 50.

It can be divided in two parts, 25285 and 6157531, that added together give a palindrome (6182816).

The spelling of 252856157531 in words is "two hundred fifty-two billion, eight hundred fifty-six million, one hundred fifty-seven thousand, five hundred thirty-one".