2531857156 has 6 divisors (see below), whose sum is σ = 4430750030. Its totient is φ = 1265928576.

The previous prime is 2531857129. The next prime is 2531857187. The reversal of 2531857156 is 6517581352.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 1855024900 + 676832256 = 43070^2 + 26016^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 316482141 + ... + 316482148.

Almost surely, 2^2531857156 is an apocalyptic number.

It is an amenable number.

2531857156 is a deficient number, since it is larger than the sum of its proper divisors (1898892874).

2531857156 is a wasteful number, since it uses less digits than its factorization.

2531857156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 632964293 (or 632964291 counting only the distinct ones).

The product of its digits is 252000, while the sum is 43.

The square root of 2531857156 is about 50317.5630967955. The cubic root of 2531857156 is about 1362.9494014113.

The spelling of 2531857156 in words is "two billion, five hundred thirty-one million, eight hundred fifty-seven thousand, one hundred fifty-six".