402043431321 has 48 divisors (see below), whose sum is σ = 667398371328. Its totient is φ = 228456547200.

The previous prime is 402043431311. The next prime is 402043431379. The reversal of 402043431321 is 123134340204.

402043431321 is a `hidden beast` number, since 4 + 0 + 204 + 3 + 431 + 3 + 21 = 666.

It is not a de Polignac number, because 402043431321 - 2⁵ = 402043431289 is a prime.

It is not an unprimeable number, because it can be changed into a prime (402043431311) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 61088251 + ... + 61094831.

It is an arithmetic number, because the mean of its divisors is an integer number (13904132736).

Almost surely, 2^402043431321 is an apocalyptic number.

It is an amenable number.

402043431321 is a deficient number, since it is larger than the sum of its proper divisors (265354940007).

402043431321 is a wasteful number, since it uses less digits than its factorization.

402043431321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11862 (or 11859 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 27.

Adding to 402043431321 its reverse (123134340204), we get a palindrome (525177771525).

The spelling of 402043431321 in words is "four hundred two billion, forty-three million, four hundred thirty-one thousand, three hundred twenty-one".