56171622643331 has 4 divisors (see below), whose sum is σ = 60492516692832. Its totient is φ = 51850728593832.

The previous prime is 56171622643327. The next prime is 56171622643387. The reversal of 56171622643331 is 13334622617165.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 56171622643331 - 2² = 56171622643327 is a prime.

It is a super-2 number, since 2×56171622643331² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 56171622643331.

It is not an unprimeable number, because it can be changed into a prime (56171622643531) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2160447024731 + ... + 2160447024756.

It is an arithmetic number, because the mean of its divisors is an integer number (15123129173208).

Almost surely, 2^{56171622643331} is an apocalyptic number.

56171622643331 is a deficient number, since it is larger than the sum of its proper divisors (4320894049501).

56171622643331 is a wasteful number, since it uses less digits than its factorization.

56171622643331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4320894049500.

The product of its digits is 3265920, while the sum is 50.

The spelling of 56171622643331 in words is "fifty-six trillion, one hundred seventy-one billion, six hundred twenty-two million, six hundred forty-three thousand, three hundred thirty-one".