2156226523613 has 2 divisors, whose sum is σ = 2156226523614. Its totient is φ = 2156226523612.

The previous prime is 2156226523597. The next prime is 2156226523621. The reversal of 2156226523613 is 3163256226512.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1608681282244 + 547545241369 = 1268338^2 + 739963^2 .

It is a cyclic number.

It is not a de Polignac number, because 2156226523613 - 2⁴ = 2156226523597 is a prime.

It is a super-2 number, since 2×2156226523613² (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 (2156226523513) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1078113261806 + 1078113261807.

It is an arithmetic number, because the mean of its divisors is an integer number (1078113261807).

Almost surely, 2^{2156226523613} is an apocalyptic number.

It is an amenable number.

2156226523613 is a deficient number, since it is larger than the sum of its proper divisors (1).

2156226523613 is an equidigital number, since it uses as much as digits as its factorization.

2156226523613 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 777600, while the sum is 44.

The spelling of 2156226523613 in words is "two trillion, one hundred fifty-six billion, two hundred twenty-six million, five hundred twenty-three thousand, six hundred thirteen".