318828431 has 2 divisors, whose sum is σ = 318828432. Its totient is φ = 318828430.

The previous prime is 318828343. The next prime is 318828439. The reversal of 318828431 is 134828813.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-318828431 is a prime.

It is a super-2 number, since 2×318828431² = 203303136827843522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (318828439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 159414215 + 159414216.

It is an arithmetic number, because the mean of its divisors is an integer number (159414216).

Almost surely, 2^318828431 is an apocalyptic number.

318828431 is a deficient number, since it is larger than the sum of its proper divisors (1).

318828431 is an equidigital number, since it uses as much as digits as its factorization.

318828431 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 36864, while the sum is 38.

The square root of 318828431 is about 17855.7674436021. The cubic root of 318828431 is about 683.1546267300.

The spelling of 318828431 in words is "three hundred eighteen million, eight hundred twenty-eight thousand, four hundred thirty-one".