402230431 has 2 divisors, whose sum is σ = 402230432. Its totient is φ = 402230430.

The previous prime is 402230429. The next prime is 402230449. The reversal of 402230431 is 134032204.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 402230431 - 2¹ = 402230429 is a prime.

It is a super-2 number, since 2×402230431² = 323578639244891522, which contains 22 as substring.

Together with 402230429, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 402230399 and 402230408.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (402230531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 201115215 + 201115216.

It is an arithmetic number, because the mean of its divisors is an integer number (201115216).

Almost surely, 2^402230431 is an apocalyptic number.

402230431 is a deficient number, since it is larger than the sum of its proper divisors (1).

402230431 is an equidigital number, since it uses as much as digits as its factorization.

402230431 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 402230431 is about 20055.6832593657. The cubic root of 402230431 is about 738.1732584550.

Adding to 402230431 its reverse (134032204), we get a palindrome (536262635).

It can be divided in two parts, 4022 and 30431, that added together give a triangular number (34453 = T₂₆₂).

The spelling of 402230431 in words is "four hundred two million, two hundred thirty thousand, four hundred thirty-one".