2165222631 has 16 divisors (see below), whose sum is σ = 3391678080. Its totient is φ = 1211313120.

The previous prime is 2165222623. The next prime is 2165222681. The reversal of 2165222631 is 1362225612.

It is not a de Polignac number, because 2165222631 - 2³ = 2165222623 is a prime.

It is a super-2 number, since 2×2165222631² = 9376378083589124322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2165222681) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2523141 + ... + 2523998.

It is an arithmetic number, because the mean of its divisors is an integer number (211979880).

Almost surely, 2^2165222631 is an apocalyptic number.

2165222631 is a deficient number, since it is larger than the sum of its proper divisors (1226455449).

2165222631 is a wasteful number, since it uses less digits than its factorization.

2165222631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5047166.

The product of its digits is 8640, while the sum is 30.

The square root of 2165222631 is about 46531.9527959014. The cubic root of 2165222631 is about 1293.7018104107.

The spelling of 2165222631 in words is "two billion, one hundred sixty-five million, two hundred twenty-two thousand, six hundred thirty-one".