2166274431 has 6 divisors (see below), whose sum is σ = 3129063080. Its totient is φ = 1444182948.

The previous prime is 2166274423. The next prime is 2166274463. The reversal of 2166274431 is 1344726612.

2166274431 is a `hidden beast` number, since 21 + 6 + 627 + 4 + 4 + 3 + 1 = 666.

It is not a de Polignac number, because 2166274431 - 2³ = 2166274423 is a prime.

It is a super-2 number, since 2×2166274431² = 9385489820808747522, 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 (2166274421) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 120348571 + ... + 120348588.

Almost surely, 2^2166274431 is an apocalyptic number.

2166274431 is a deficient number, since it is larger than the sum of its proper divisors (962788649).

2166274431 is a wasteful number, since it uses less digits than its factorization.

2166274431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 240697165 (or 240697162 counting only the distinct ones).

The product of its digits is 48384, while the sum is 36.

The square root of 2166274431 is about 46543.2533349357. The cubic root of 2166274431 is about 1293.9112569702.

The spelling of 2166274431 in words is "two billion, one hundred sixty-six million, two hundred seventy-four thousand, four hundred thirty-one".