2515720939 has 2 divisors, whose sum is σ = 2515720940. Its totient is φ = 2515720938.

The previous prime is 2515720901. The next prime is 2515720943. The reversal of 2515720939 is 9390275152.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2515720939 - 2⁷ = 2515720811 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2515720895 and 2515720904.

It is not a weakly prime, because it can be changed into another prime (2515720439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1257860469 + 1257860470.

It is an arithmetic number, because the mean of its divisors is an integer number (1257860470).

Almost surely, 2^2515720939 is an apocalyptic number.

2515720939 is a deficient number, since it is larger than the sum of its proper divisors (1).

2515720939 is an equidigital number, since it uses as much as digits as its factorization.

2515720939 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 170100, while the sum is 43.

The square root of 2515720939 is about 50156.9630161157. The cubic root of 2515720939 is about 1360.0477454042.

The spelling of 2515720939 in words is "two billion, five hundred fifteen million, seven hundred twenty thousand, nine hundred thirty-nine".