315303661 has 2 divisors, whose sum is σ = 315303662. Its totient is φ = 315303660.

The previous prime is 315303643. The next prime is 315303671. The reversal of 315303661 is 166303513.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 249450436 + 65853225 = 15794^2 + 8115^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-315303661 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (315303671) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 157651830 + 157651831.

It is an arithmetic number, because the mean of its divisors is an integer number (157651831).

Almost surely, 2^315303661 is an apocalyptic number.

It is an amenable number.

315303661 is a deficient number, since it is larger than the sum of its proper divisors (1).

315303661 is an equidigital number, since it uses as much as digits as its factorization.

315303661 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4860, while the sum is 28.

The square root of 315303661 is about 17756.7919681456. The cubic root of 315303661 is about 680.6277802567.

The spelling of 315303661 in words is "three hundred fifteen million, three hundred three thousand, six hundred sixty-one".