2015920391 has 2 divisors, whose sum is σ = 2015920392. Its totient is φ = 2015920390.

The previous prime is 2015920373. The next prime is 2015920493. The reversal of 2015920391 is 1930295102.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2015920391 - 2¹⁸ = 2015658247 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2015920091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1007960195 + 1007960196.

It is an arithmetic number, because the mean of its divisors is an integer number (1007960196).

Almost surely, 2^2015920391 is an apocalyptic number.

2015920391 is a deficient number, since it is larger than the sum of its proper divisors (1).

2015920391 is an equidigital number, since it uses as much as digits as its factorization.

2015920391 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4860, while the sum is 32.

The square root of 2015920391 is about 44899.0021158600. The cubic root of 2015920391 is about 1263.2552910362.

The spelling of 2015920391 in words is "two billion, fifteen million, nine hundred twenty thousand, three hundred ninety-one".