2156217110039 has 2 divisors, whose sum is σ = 2156217110040. Its totient is φ = 2156217110038.

The previous prime is 2156217110017. The next prime is 2156217110101. The reversal of 2156217110039 is 9300117126512.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2156217110039 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2156217109984 and 2156217110011.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2156217110239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1078108555019 + 1078108555020.

It is an arithmetic number, because the mean of its divisors is an integer number (1078108555020).

Almost surely, 2^{2156217110039} is an apocalyptic number.

2156217110039 is a deficient number, since it is larger than the sum of its proper divisors (1).

2156217110039 is an equidigital number, since it uses as much as digits as its factorization.

2156217110039 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 22680, while the sum is 38.

The spelling of 2156217110039 in words is "two trillion, one hundred fifty-six billion, two hundred seventeen million, one hundred ten thousand, thirty-nine".