2315715989 has 2 divisors, whose sum is σ = 2315715990. Its totient is φ = 2315715988.

The previous prime is 2315715971. The next prime is 2315716031. The reversal of 2315715989 is 9895175132.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1966212964 + 349503025 = 44342^2 + 18695^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2315715989 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2315715959) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1157857994 + 1157857995.

It is an arithmetic number, because the mean of its divisors is an integer number (1157857995).

Almost surely, 2^2315715989 is an apocalyptic number.

It is an amenable number.

2315715989 is a deficient number, since it is larger than the sum of its proper divisors (1).

2315715989 is an equidigital number, since it uses as much as digits as its factorization.

2315715989 is an evil number, because the sum of its binary digits is even.

The product of its digits is 680400, while the sum is 50.

The square root of 2315715989 is about 48121.8867980049. The cubic root of 2315715989 is about 1323.0058506837.

The spelling of 2315715989 in words is "two billion, three hundred fifteen million, seven hundred fifteen thousand, nine hundred eighty-nine".