2015920139 has 2 divisors, whose sum is σ = 2015920140. Its totient is φ = 2015920138.

The previous prime is 2015920091. The next prime is 2015920141. The reversal of 2015920139 is 9310295102.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2015920139 - 2¹² = 2015916043 is a prime.

Together with 2015920141, 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 (2015926139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1007960069 + 1007960070.

It is an arithmetic number, because the mean of its divisors is an integer number (1007960070).

Almost surely, 2^2015920139 is an apocalyptic number.

2015920139 is a deficient number, since it is larger than the sum of its proper divisors (1).

2015920139 is an equidigital number, since it uses as much as digits as its factorization.

2015920139 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 32.

The square root of 2015920139 is about 44898.9993095615. Note that the first 3 decimals coincide. The cubic root of 2015920139 is about 1263.2552383985.

The spelling of 2015920139 in words is "two billion, fifteen million, nine hundred twenty thousand, one hundred thirty-nine".