56317022191 has 8 divisors (see below), whose sum is σ = 56572841168. Its totient is φ = 56061720000.

The previous prime is 56317022171. The next prime is 56317022233. The reversal of 56317022191 is 19122071365.

56317022191 = T₁₉₃₇₆₃ + T₁₉₃₇₆₄ + T₁₉₃₇₆₅.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a 6-Lehmer number, since φ(56317022191) divides (56317022191-1)⁶.

It is a cyclic number.

It is not a de Polignac number, because 56317022191 - 2⁵ = 56317022159 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 56317022191.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56317022171) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 90091 + ... + 347491.

It is an arithmetic number, because the mean of its divisors is an integer number (7071605146).

Almost surely, 2^56317022191 is an apocalyptic number.

56317022191 is the 193765-th centered triangular number.

56317022191 is a deficient number, since it is larger than the sum of its proper divisors (255818977).

56317022191 is a wasteful number, since it uses less digits than its factorization.

56317022191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 258393.

The product of its (nonzero) digits is 22680, while the sum is 37.

The spelling of 56317022191 in words is "fifty-six billion, three hundred seventeen million, twenty-two thousand, one hundred ninety-one".