404543431 has 2 divisors, whose sum is σ = 404543432. Its totient is φ = 404543430.

The previous prime is 404543413. The next prime is 404543449. The reversal of 404543431 is 134345404.

Together with previous prime (404543413) it forms an Ormiston pair, because they use the same digits, order apart.

It is a balanced prime because it is at equal distance from previous prime (404543413) and next prime (404543449).

It is a cyclic number.

It is not a de Polignac number, because 404543431 - 2²³ = 396154823 is a prime.

It is a super-2 number, since 2×404543431² = 327310775130503522, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 404543431.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (404543731) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 202271715 + 202271716.

It is an arithmetic number, because the mean of its divisors is an integer number (202271716).

Almost surely, 2^404543431 is an apocalyptic number.

404543431 is a deficient number, since it is larger than the sum of its proper divisors (1).

404543431 is an equidigital number, since it uses as much as digits as its factorization.

404543431 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11520, while the sum is 28.

The square root of 404543431 is about 20113.2650507072. The cubic root of 404543431 is about 739.5854940599.

Adding to 404543431 its reverse (134345404), we get a palindrome (538888835).

The spelling of 404543431 in words is "four hundred four million, five hundred forty-three thousand, four hundred thirty-one".