2163442121631 has 48 divisors (see below), whose sum is σ = 3653534547520. Its totient is φ = 1208130992640.

The previous prime is 2163442121609. The next prime is 2163442121657. The reversal of 2163442121631 is 1361212443612.

2163442121631 is a `hidden beast` number, since 2 + 1 + 6 + 3 + 4 + 4 + 2 + 12 + 1 + 631 = 666.

It is not a de Polignac number, because 2163442121631 - 2²⁶ = 2163375012767 is a prime.

It is a super-2 number, since 2×2163442121631² (a number of 25 digits) 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 (2163442122631) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1656580 + ... + 2659161.

Almost surely, 2^{2163442121631} is an apocalyptic number.

2163442121631 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

2163442121631 is a deficient number, since it is larger than the sum of its proper divisors (1490092425889).

2163442121631 is a wasteful number, since it uses less digits than its factorization.

2163442121631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4315936 (or 4315933 counting only the distinct ones).

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

The spelling of 2163442121631 in words is "two trillion, one hundred sixty-three billion, four hundred forty-two million, one hundred twenty-one thousand, six hundred thirty-one".