400130431 has 2 divisors, whose sum is σ = 400130432. Its totient is φ = 400130430.

The previous prime is 400130417. The next prime is 400130551. The reversal of 400130431 is 134031004.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 400130431 - 2⁷ = 400130303 is a prime.

It is a super-2 number, since 2×400130431² = 320208723624491522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (400136431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200065215 + 200065216.

It is an arithmetic number, because the mean of its divisors is an integer number (200065216).

Almost surely, 2^400130431 is an apocalyptic number.

400130431 is a deficient number, since it is larger than the sum of its proper divisors (1).

400130431 is an equidigital number, since it uses as much as digits as its factorization.

400130431 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 400130431 is about 20003.2605092270. The cubic root of 400130431 is about 736.8863763437.

Adding to 400130431 its reverse (134031004), we get a palindrome (534161435).

The spelling of 400130431 in words is "four hundred million, one hundred thirty thousand, four hundred thirty-one".