402433131 has 4 divisors (see below), whose sum is σ = 536577512. Its totient is φ = 268288752.

The previous prime is 402433117. The next prime is 402433133. The reversal of 402433131 is 131334204.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 402433131 - 2²³ = 394044523 is a prime.

It is a super-2 number, since 2×402433131² = 323904849852926322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 402433098 and 402433107.

It is not an unprimeable number, because it can be changed into a prime (402433133) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 67072186 + ... + 67072191.

It is an arithmetic number, because the mean of its divisors is an integer number (134144378).

Almost surely, 2^402433131 is an apocalyptic number.

402433131 is a deficient number, since it is larger than the sum of its proper divisors (134144381).

402433131 is a wasteful number, since it uses less digits than its factorization.

402433131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134144380.

The product of its (nonzero) digits is 864, while the sum is 21.

The square root of 402433131 is about 20060.7360532958. The cubic root of 402433131 is about 738.2972359734.

Adding to 402433131 its reverse (131334204), we get a palindrome (533767335).

The spelling of 402433131 in words is "four hundred two million, four hundred thirty-three thousand, one hundred thirty-one".