315224639 has 2 divisors, whose sum is σ = 315224640. Its totient is φ = 315224638.

The previous prime is 315224633. The next prime is 315224671. The reversal of 315224639 is 936422513.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-315224639 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 315224599 and 315224608.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (315224633) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 157612319 + 157612320.

It is an arithmetic number, because the mean of its divisors is an integer number (157612320).

Almost surely, 2^315224639 is an apocalyptic number.

315224639 is a deficient number, since it is larger than the sum of its proper divisors (1).

315224639 is an equidigital number, since it uses as much as digits as its factorization.

315224639 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 38880, while the sum is 35.

The square root of 315224639 is about 17754.5667083148. The cubic root of 315224639 is about 680.5709154320.

The spelling of 315224639 in words is "three hundred fifteen million, two hundred twenty-four thousand, six hundred thirty-nine".