402232031 has 2 divisors, whose sum is σ = 402232032. Its totient is φ = 402232030.

The previous prime is 402231997. The next prime is 402232049. The reversal of 402232031 is 130232204.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 402232031 - 2⁶ = 402231967 is a prime.

It is a super-2 number, since 2×402232031² = 323581213524769922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (402232091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 201116015 + 201116016.

It is an arithmetic number, because the mean of its divisors is an integer number (201116016).

Almost surely, 2^402232031 is an apocalyptic number.

402232031 is a deficient number, since it is larger than the sum of its proper divisors (1).

402232031 is an equidigital number, since it uses as much as digits as its factorization.

402232031 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 17.

The square root of 402232031 is about 20055.7231482687. The cubic root of 402232031 is about 738.1742372270.

Adding to 402232031 its reverse (130232204), we get a palindrome (532464235).

The spelling of 402232031 in words is "four hundred two million, two hundred thirty-two thousand, thirty-one".