2015771055 has 16 divisors (see below), whose sum is σ = 3226833504. Its totient is φ = 1074544640.

The previous prime is 2015771041. The next prime is 2015771077. The reversal of 2015771055 is 5501775102.

It is not a de Polignac number, because 2015771055 - 2⁷ = 2015770927 is a prime.

It is a congruent number.

It is an unprimeable number.

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 in 15 ways as a sum of consecutive naturals, for example, 1074 + ... + 63503.

It is an arithmetic number, because the mean of its divisors is an integer number (201677094).

Almost surely, 2^2015771055 is an apocalyptic number.

2015771055 is a deficient number, since it is larger than the sum of its proper divisors (1211062449).

2015771055 is a wasteful number, since it uses less digits than its factorization.

2015771055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66666.

The product of its (nonzero) digits is 12250, while the sum is 33.

The square root of 2015771055 is about 44897.3390636906. The cubic root of 2015771055 is about 1263.2240969885.

The spelling of 2015771055 in words is "two billion, fifteen million, seven hundred seventy-one thousand, fifty-five".