2131254631 has 24 divisors (see below), whose sum is σ = 2432849328. Its totient is φ = 1851360000.

The previous prime is 2131254617. The next prime is 2131254647. The reversal of 2131254631 is 1364521312.

It is not a de Polignac number, because 2131254631 - 2⁵ = 2131254599 is a prime.

It is a super-2 number, since 2×2131254631² = 9084492604317892322, which contains 22 as substring.

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

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 2131254631.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2131224631) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 933211 + ... + 935491.

It is an arithmetic number, because the mean of its divisors is an integer number (101368722).

Almost surely, 2^2131254631 is an apocalyptic number.

2131254631 is a deficient number, since it is larger than the sum of its proper divisors (301594697).

2131254631 is a wasteful number, since it uses less digits than its factorization.

2131254631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2451 (or 2422 counting only the distinct ones).

The product of its digits is 4320, while the sum is 28.

The square root of 2131254631 is about 46165.5134380633. The cubic root of 2131254631 is about 1286.9009258812.

Adding to 2131254631 its reverse (1364521312), we get a palindrome (3495775943).

The spelling of 2131254631 in words is "two billion, one hundred thirty-one million, two hundred fifty-four thousand, six hundred thirty-one".