2161831853275 has 24 divisors (see below), whose sum is σ = 2800565060400. Its totient is φ = 1653295728000.

The previous prime is 2161831853273. The next prime is 2161831853287. The reversal of 2161831853275 is 5723581381612.

It is not a de Polignac number, because 2161831853275 - 2¹ = 2161831853273 is a prime.

It is a super-2 number, since 2×2161831853275² (a number of 25 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (52) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (2161831853273) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 14688345 + ... + 14834794.

It is an arithmetic number, because the mean of its divisors is an integer number (116690210850).

Almost surely, 2^{2161831853275} is an apocalyptic number.

2161831853275 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

2161831853275 is a deficient number, since it is larger than the sum of its proper divisors (638733207125).

2161831853275 is a wasteful number, since it uses less digits than its factorization.

2161831853275 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29523279 (or 29523274 counting only the distinct ones).

The product of its digits is 2419200, while the sum is 52.

The spelling of 2161831853275 in words is "two trillion, one hundred sixty-one billion, eight hundred thirty-one million, eight hundred fifty-three thousand, two hundred seventy-five".