2381642631 has 12 divisors (see below), whose sum is σ = 3441149608. Its totient is φ = 1587300624.

The previous prime is 2381642623. The next prime is 2381642651. The reversal of 2381642631 is 1362461832.

2381642631 is a `hidden beast` number, since 2 + 3 + 8 + 1 + 642 + 6 + 3 + 1 = 666.

It is not a de Polignac number, because 2381642631 - 2³ = 2381642623 is a prime.

It is a super-2 number, since 2×2381642631² = 11344443243593204322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2381642621) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4105 + ... + 69138.

Almost surely, 2^2381642631 is an apocalyptic number.

2381642631 is a deficient number, since it is larger than the sum of its proper divisors (1059506977).

2381642631 is a wasteful number, since it uses less digits than its factorization.

2381642631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76862 (or 76859 counting only the distinct ones).

The product of its digits is 41472, while the sum is 36.

The square root of 2381642631 is about 48802.0760931336. The cubic root of 2381642631 is about 1335.4435407081.

The spelling of 2381642631 in words is "two billion, three hundred eighty-one million, six hundred forty-two thousand, six hundred thirty-one".