2156315020571 has 2 divisors, whose sum is σ = 2156315020572. Its totient is φ = 2156315020570.

The previous prime is 2156315020523. The next prime is 2156315020619. The reversal of 2156315020571 is 1750205136512.

It is a balanced prime because it is at equal distance from previous prime (2156315020523) and next prime (2156315020619).

It is a cyclic number.

It is not a de Polignac number, because 2156315020571 - 2⁶ = 2156315020507 is a prime.

It is a super-2 number, since 2×2156315020571² (a number of 25 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (2156315020511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1078157510285 + 1078157510286.

It is an arithmetic number, because the mean of its divisors is an integer number (1078157510286).

Almost surely, 2^{2156315020571} is an apocalyptic number.

2156315020571 is a deficient number, since it is larger than the sum of its proper divisors (1).

2156315020571 is an equidigital number, since it uses as much as digits as its factorization.

2156315020571 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 63000, while the sum is 38.

The spelling of 2156315020571 in words is "two trillion, one hundred fifty-six billion, three hundred fifteen million, twenty thousand, five hundred seventy-one".