168521850231 has 16 divisors (see below), whose sum is σ = 257345097984. Its totient is φ = 96091988544.

The previous prime is 168521850229. The next prime is 168521850239. The reversal of 168521850231 is 132058125861.

It is not a de Polignac number, because 168521850231 - 2¹ = 168521850229 is a prime.

It is a super-2 number, since 2×168521850231² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (168521850239) 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, 8582110 + ... + 8601723.

It is an arithmetic number, because the mean of its divisors is an integer number (16084068624).

Almost surely, 2^168521850231 is an apocalyptic number.

168521850231 is a deficient number, since it is larger than the sum of its proper divisors (88823247753).

168521850231 is a wasteful number, since it uses less digits than its factorization.

168521850231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17184310.

The product of its (nonzero) digits is 115200, while the sum is 42.

The spelling of 168521850231 in words is "one hundred sixty-eight billion, five hundred twenty-one million, eight hundred fifty thousand, two hundred thirty-one".