2164365531 has 12 divisors (see below), whose sum is σ = 3126871800. Its totient is φ = 1442649120.

The previous prime is 2164365529. The next prime is 2164365551. The reversal of 2164365531 is 1355634612.

2164365531 is a `hidden beast` number, since 2 + 1 + 64 + 3 + 65 + 531 = 666.

It is not a de Polignac number, because 2164365531 - 2¹ = 2164365529 is a prime.

It is a super-2 number, since 2×2164365531² = 9368956303561823922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2164365551) 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, 39895 + ... + 76943.

It is an arithmetic number, because the mean of its divisors is an integer number (260572650).

Almost surely, 2^2164365531 is an apocalyptic number.

2164365531 is a deficient number, since it is larger than the sum of its proper divisors (962506269).

2164365531 is a wasteful number, since it uses less digits than its factorization.

2164365531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43546 (or 43543 counting only the distinct ones).

The product of its digits is 64800, while the sum is 36.

The square root of 2164365531 is about 46522.7420838454. The cubic root of 2164365531 is about 1293.5310846005.

The spelling of 2164365531 in words is "two billion, one hundred sixty-four million, three hundred sixty-five thousand, five hundred thirty-one".