216232921057 has 16 divisors (see below), whose sum is σ = 222110775040. Its totient is φ = 210437315712.

The previous prime is 216232921043. The next prime is 216232921097. The reversal of 216232921057 is 750129232612.

216232921057 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 216232921057 - 2⁷ = 216232920929 is a prime.

It is a super-2 number, since 2×216232921057² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (216232921097) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9752458 + ... + 9774604.

It is an arithmetic number, because the mean of its divisors is an integer number (13881923440).

Almost surely, 2^216232921057 is an apocalyptic number.

It is an amenable number.

216232921057 is a deficient number, since it is larger than the sum of its proper divisors (5877853983).

216232921057 is a wasteful number, since it uses less digits than its factorization.

216232921057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23992.

The product of its (nonzero) digits is 90720, while the sum is 40.

The spelling of 216232921057 in words is "two hundred sixteen billion, two hundred thirty-two million, nine hundred twenty-one thousand, fifty-seven".