2156275565071 has 2 divisors, whose sum is σ = 2156275565072. Its totient is φ = 2156275565070.

The previous prime is 2156275565033. The next prime is 2156275565107. The reversal of 2156275565071 is 1705655726512.

It is a happy number.

Together with next prime (2156275565107) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2156275565071 - 2⁹ = 2156275564559 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2156275568071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1078137782535 + 1078137782536.

It is an arithmetic number, because the mean of its divisors is an integer number (1078137782536).

Almost surely, 2^{2156275565071} is an apocalyptic number.

2156275565071 is a deficient number, since it is larger than the sum of its proper divisors (1).

2156275565071 is an equidigital number, since it uses as much as digits as its factorization.

2156275565071 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4410000, while the sum is 52.

The spelling of 2156275565071 in words is "two trillion, one hundred fifty-six billion, two hundred seventy-five million, five hundred sixty-five thousand, seventy-one".