2015055657 has 16 divisors (see below), whose sum is σ = 3021238080. Its totient is φ = 1327183776.

The previous prime is 2015055649. The next prime is 2015055683. The reversal of 2015055657 is 7565505102.

It is a happy number.

2015055657 is a `hidden beast` number, since 2 + 0 + 1 + 50 + 556 + 57 = 666.

2015055657 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 2015055657 - 2³ = 2015055649 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2015055457) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 447348 + ... + 451829.

It is an arithmetic number, because the mean of its divisors is an integer number (188827380).

Almost surely, 2^2015055657 is an apocalyptic number.

2015055657 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

It is an amenable number.

2015055657 is a deficient number, since it is larger than the sum of its proper divisors (1006182423).

2015055657 is an equidigital number, since it uses as much as digits as its factorization.

2015055657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 899269 (or 899263 counting only the distinct ones).

The product of its (nonzero) digits is 52500, while the sum is 36.

The square root of 2015055657 is about 44889.3713143769. The cubic root of 2015055657 is about 1263.0746397175.

The spelling of 2015055657 in words is "two billion, fifteen million, fifty-five thousand, six hundred fifty-seven".