231353355314221 has 36 divisors (see below), whose sum is σ = 284498688593052. Its totient is φ = 187559404091136.

The previous prime is 231353355314149. The next prime is 231353355314309. The reversal of 231353355314221 is 122413553353132.

It can be written as a sum of positive squares in 2 ways, for example, as 15229396980196 + 216123958334025 = 3902486^2 + 14701155^2 .

It is a de Polignac number, because none of the positive numbers 2^k-231353355314221 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231353355314321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 175381 + ... + 21511333.

It is an arithmetic number, because the mean of its divisors is an integer number (7902741349807).

Almost surely, 2^{231353355314221} is an apocalyptic number.

It is an amenable number.

231353355314221 is a deficient number, since it is larger than the sum of its proper divisors (53145333278831).

231353355314221 is a wasteful number, since it uses less digits than its factorization.

231353355314221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21336618 (or 21336592 counting only the distinct ones).

The product of its digits is 972000, while the sum is 43.

The spelling of 231353355314221 in words is "two hundred thirty-one trillion, three hundred fifty-three billion, three hundred fifty-five million, three hundred fourteen thousand, two hundred twenty-one".