2156314241197 has 2 divisors, whose sum is σ = 2156314241198. Its totient is φ = 2156314241196.

The previous prime is 2156314241173. The next prime is 2156314241201. The reversal of 2156314241197 is 7911424136512.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1490892282441 + 665421958756 = 1221021^2 + 815734^2 .

It is a cyclic number.

It is not a de Polignac number, because 2156314241197 - 2⁷ = 2156314241069 is a prime.

It is a super-2 number, since 2×2156314241197² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2156314241167) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1078157120598 + 1078157120599.

It is an arithmetic number, because the mean of its divisors is an integer number (1078157120599).

Almost surely, 2^{2156314241197} is an apocalyptic number.

It is an amenable number.

2156314241197 is a deficient number, since it is larger than the sum of its proper divisors (1).

2156314241197 is an equidigital number, since it uses as much as digits as its factorization.

2156314241197 is an evil number, because the sum of its binary digits is even.

The product of its digits is 362880, while the sum is 46.

The spelling of 2156314241197 in words is "two trillion, one hundred fifty-six billion, three hundred fourteen million, two hundred forty-one thousand, one hundred ninety-seven".