315085649 has 2 divisors, whose sum is σ = 315085650. Its totient is φ = 315085648.

The previous prime is 315085621. The next prime is 315085699. The reversal of 315085649 is 946580513.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 271195024 + 43890625 = 16468^2 + 6625^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-315085649 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (315085619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 157542824 + 157542825.

It is an arithmetic number, because the mean of its divisors is an integer number (157542825).

Almost surely, 2^315085649 is an apocalyptic number.

It is an amenable number.

315085649 is a deficient number, since it is larger than the sum of its proper divisors (1).

315085649 is an equidigital number, since it uses as much as digits as its factorization.

315085649 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 129600, while the sum is 41.

The square root of 315085649 is about 17750.6520725296. The cubic root of 315085649 is about 680.4708741218.

The spelling of 315085649 in words is "three hundred fifteen million, eighty-five thousand, six hundred forty-nine".