2152161631 has 16 divisors (see below), whose sum is σ = 2350373760. Its totient is φ = 1962764800.

The previous prime is 2152161629. The next prime is 2152161677. The reversal of 2152161631 is 1361612512.

It is a cyclic number.

It is not a de Polignac number, because 2152161631 - 2¹ = 2152161629 is a prime.

It is a super-2 number, since 2×2152161631² = 9263599371897160322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2152161631.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2152164631) 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, 67365 + ... + 94033.

It is an arithmetic number, because the mean of its divisors is an integer number (146898360).

Almost surely, 2^2152161631 is an apocalyptic number.

2152161631 is a deficient number, since it is larger than the sum of its proper divisors (198212129).

2152161631 is a wasteful number, since it uses less digits than its factorization.

2152161631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26834.

The product of its digits is 2160, while the sum is 28.

The square root of 2152161631 is about 46391.3960880679. The cubic root of 2152161631 is about 1291.0952841477.

The spelling of 2152161631 in words is "two billion, one hundred fifty-two million, one hundred sixty-one thousand, six hundred thirty-one".