402250566921 has 32 divisors (see below), whose sum is σ = 637838699520. Its totient is φ = 220706627904.

The previous prime is 402250566791. The next prime is 402250566961. The reversal of 402250566921 is 129665052204.

It is not a de Polignac number, because 402250566921 - 2⁹ = 402250566409 is a prime.

It is not an unprimeable number, because it can be changed into a prime (402250566961) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3721810 + ... + 3828363.

It is an arithmetic number, because the mean of its divisors is an integer number (19932459360).

Almost surely, 2^402250566921 is an apocalyptic number.

It is an amenable number.

402250566921 is a deficient number, since it is larger than the sum of its proper divisors (235588132599).

402250566921 is a wasteful number, since it uses less digits than its factorization.

402250566921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7550285.

The product of its (nonzero) digits is 259200, while the sum is 42.

The spelling of 402250566921 in words is "four hundred two billion, two hundred fifty million, five hundred sixty-six thousand, nine hundred twenty-one".