402443131 has 2 divisors, whose sum is σ = 402443132. Its totient is φ = 402443130.

The previous prime is 402443089. The next prime is 402443177. The reversal of 402443131 is 131344204.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 402443131 - 2²⁵ = 368888699 is a prime.

It is a super-2 number, since 2×402443131² = 323920947378166322, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (402443831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 201221565 + 201221566.

It is an arithmetic number, because the mean of its divisors is an integer number (201221566).

Almost surely, 2^402443131 is an apocalyptic number.

402443131 is a deficient number, since it is larger than the sum of its proper divisors (1).

402443131 is an equidigital number, since it uses as much as digits as its factorization.

402443131 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1152, while the sum is 22.

The square root of 402443131 is about 20060.9852948453. The cubic root of 402443131 is about 738.3033512016.

Adding to 402443131 its reverse (131344204), we get a palindrome (533787335).

The spelling of 402443131 in words is "four hundred two million, four hundred forty-three thousand, one hundred thirty-one".