402441131 has 2 divisors, whose sum is σ = 402441132. Its totient is φ = 402441130.

The previous prime is 402441121. The next prime is 402441133. The reversal of 402441131 is 131144204.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 402441131 - 2²⁶ = 335332267 is a prime.

It is a super-2 number, since 2×402441131² = 323917727841118322, which contains 22 as substring.

Together with 402441133, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (402441133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 201220565 + 201220566.

It is an arithmetic number, because the mean of its divisors is an integer number (201220566).

Almost surely, 2^402441131 is an apocalyptic number.

402441131 is a deficient number, since it is larger than the sum of its proper divisors (1).

402441131 is an equidigital number, since it uses as much as digits as its factorization.

402441131 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 402441131 is about 20060.9354467831. The cubic root of 402441131 is about 738.3021281640.

Adding to 402441131 its reverse (131144204), we get a palindrome (533585335).

The spelling of 402441131 in words is "four hundred two million, four hundred forty-one thousand, one hundred thirty-one".