304431431 has 2 divisors, whose sum is σ = 304431432. Its totient is φ = 304431430.

The previous prime is 304431409. The next prime is 304431527. The reversal of 304431431 is 134134403.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 304431431 - 2⁶ = 304431367 is a prime.

It is a super-2 number, since 2×304431431² = 185356992361415522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 304431397 and 304431406.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (304451431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 152215715 + 152215716.

It is an arithmetic number, because the mean of its divisors is an integer number (152215716).

Almost surely, 2^304431431 is an apocalyptic number.

304431431 is a deficient number, since it is larger than the sum of its proper divisors (1).

304431431 is an equidigital number, since it uses as much as digits as its factorization.

304431431 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1728, while the sum is 23.

The square root of 304431431 is about 17447.9635201361. The cubic root of 304431431 is about 672.7130144293.

Adding to 304431431 its reverse (134134403), we get a palindrome (438565834).

The spelling of 304431431 in words is "three hundred four million, four hundred thirty-one thousand, four hundred thirty-one".