400230431 has 2 divisors, whose sum is σ = 400230432. Its totient is φ = 400230430.

The previous prime is 400230409. The next prime is 400230433. The reversal of 400230431 is 134032004.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 400230431 - 2¹⁴ = 400214047 is a prime.

It is a super-2 number, since 2×400230431² = 320368795796891522, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 400230433, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (400230433) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200115215 + 200115216.

It is an arithmetic number, because the mean of its divisors is an integer number (200115216).

Almost surely, 2^400230431 is an apocalyptic number.

400230431 is a deficient number, since it is larger than the sum of its proper divisors (1).

400230431 is an equidigital number, since it uses as much as digits as its factorization.

400230431 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 17.

The square root of 400230431 is about 20005.7599455757. The cubic root of 400230431 is about 736.9477584115.

Adding to 400230431 its reverse (134032004), we get a palindrome (534262435).

The spelling of 400230431 in words is "four hundred million, two hundred thirty thousand, four hundred thirty-one".