2056171101157 has 2 divisors, whose sum is σ = 2056171101158. Its totient is φ = 2056171101156.

The previous prime is 2056171101139. The next prime is 2056171101161. The reversal of 2056171101157 is 7511011716502.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2055684942756 + 486158401 = 1433766^2 + 22049^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2056171101157 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2056171101107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1028085550578 + 1028085550579.

It is an arithmetic number, because the mean of its divisors is an integer number (1028085550579).

Almost surely, 2^{2056171101157} is an apocalyptic number.

It is an amenable number.

2056171101157 is a deficient number, since it is larger than the sum of its proper divisors (1).

2056171101157 is an equidigital number, since it uses as much as digits as its factorization.

2056171101157 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 14700, while the sum is 37.

Adding to 2056171101157 its reverse (7511011716502), we get a palindrome (9567182817659).

The spelling of 2056171101157 in words is "two trillion, fifty-six billion, one hundred seventy-one million, one hundred one thousand, one hundred fifty-seven".