2515313891 has 2 divisors, whose sum is σ = 2515313892. Its totient is φ = 2515313890.

The previous prime is 2515313861. The next prime is 2515313893. The reversal of 2515313891 is 1983135152.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2515313891 - 2²² = 2511119587 is a prime.

It is a Sophie Germain prime.

Together with 2515313893, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (2515313893) 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, 1257656945 + 1257656946.

It is an arithmetic number, because the mean of its divisors is an integer number (1257656946).

Almost surely, 2^2515313891 is an apocalyptic number.

2515313891 is a deficient number, since it is larger than the sum of its proper divisors (1).

2515313891 is an equidigital number, since it uses as much as digits as its factorization.

2515313891 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 32400, while the sum is 38.

The square root of 2515313891 is about 50152.9051102725. The cubic root of 2515313891 is about 1359.9743887550.

The spelling of 2515313891 in words is "two billion, five hundred fifteen million, three hundred thirteen thousand, eight hundred ninety-one".