231417640501621 has 32 divisors (see below), whose sum is σ = 270538198457600. Its totient is φ = 197870913882432.

The previous prime is 231417640501613. The next prime is 231417640501753. The reversal of 231417640501621 is 126105046714132.

It is not a de Polignac number, because 231417640501621 - 2³ = 231417640501613 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231417640201621) 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 31 ways as a sum of consecutive naturals, for example, 254590486 + ... + 255497848.

It is an arithmetic number, because the mean of its divisors is an integer number (8454318701800).

Almost surely, 2^{231417640501621} is an apocalyptic number.

It is an amenable number.

231417640501621 is a deficient number, since it is larger than the sum of its proper divisors (39120557955979).

231417640501621 is an equidigital number, since it uses as much as digits as its factorization.

231417640501621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 909210 (or 909196 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 43.

The spelling of 231417640501621 in words is "two hundred thirty-one trillion, four hundred seventeen billion, six hundred forty million, five hundred one thousand, six hundred twenty-one".