2531031388 has 12 divisors (see below), whose sum is σ = 4485372640. Its totient is φ = 1249496352.

The previous prime is 2531031367. The next prime is 2531031413. The reversal of 2531031388 is 8831301352.

It is a super-2 number, since 2×2531031388² = 12812239774082413088, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4004481 + ... + 4005112.

Almost surely, 2^2531031388 is an apocalyptic number.

It is an amenable number.

2531031388 is a deficient number, since it is larger than the sum of its proper divisors (1954341252).

2531031388 is a wasteful number, since it uses less digits than its factorization.

2531031388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8009676 (or 8009674 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 34.

The square root of 2531031388 is about 50309.3568633112. The cubic root of 2531031388 is about 1362.8012094830.

The spelling of 2531031388 in words is "two billion, five hundred thirty-one million, thirty-one thousand, three hundred eighty-eight".