404022431 has 2 divisors, whose sum is σ = 404022432. Its totient is φ = 404022430.

The previous prime is 404022427. The next prime is 404022467. The reversal of 404022431 is 134220404.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 404022431 - 2² = 404022427 is a prime.

It is a super-2 number, since 2×404022431² = 326468249502299522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (404022331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 202011215 + 202011216.

It is an arithmetic number, because the mean of its divisors is an integer number (202011216).

Almost surely, 2^404022431 is an apocalyptic number.

404022431 is a deficient number, since it is larger than the sum of its proper divisors (1).

404022431 is an equidigital number, since it uses as much as digits as its factorization.

404022431 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 404022431 is about 20100.3092264771. The cubic root of 404022431 is about 739.2678606100.

Adding to 404022431 its reverse (134220404), we get a palindrome (538242835).

The spelling of 404022431 in words is "four hundred four million, twenty-two thousand, four hundred thirty-one".