2015561027 has 2 divisors, whose sum is σ = 2015561028. Its totient is φ = 2015561026.

The previous prime is 2015561011. The next prime is 2015561029. The reversal of 2015561027 is 7201655102.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2015561027 - 2⁴ = 2015561011 is a prime.

It is a super-2 number, since 2×2015561027² = 8124972507122589458, which contains 22 as substring.

Together with 2015561029, 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 (2015561029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1007780513 + 1007780514.

It is an arithmetic number, because the mean of its divisors is an integer number (1007780514).

Almost surely, 2^2015561027 is an apocalyptic number.

2015561027 is a deficient number, since it is larger than the sum of its proper divisors (1).

2015561027 is an equidigital number, since it uses as much as digits as its factorization.

2015561027 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4200, while the sum is 29.

The square root of 2015561027 is about 44895.0000222742. Note that the first 4 decimals coincide. The cubic root of 2015561027 is about 1263.1802226862.

The spelling of 2015561027 in words is "two billion, fifteen million, five hundred sixty-one thousand, twenty-seven".