56222161 has 4 divisors (see below), whose sum is σ = 56315392. Its totient is φ = 56128932.

The previous prime is 56222147. The next prime is 56222183. The reversal of 56222161 is 16122265.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 16122265 = 5 ⋅3224453.

It is a cyclic number.

It is not a de Polignac number, because 56222161 - 2²¹ = 54125009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56222141) 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, 45705 + ... + 46918.

It is an arithmetic number, because the mean of its divisors is an integer number (14078848).

Almost surely, 2^56222161 is an apocalyptic number.

It is an amenable number.

56222161 is a deficient number, since it is larger than the sum of its proper divisors (93231).

56222161 is an equidigital number, since it uses as much as digits as its factorization.

56222161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93230.

The product of its digits is 1440, while the sum is 25.

The square root of 56222161 is about 7498.1438369773. The cubic root of 56222161 is about 383.0914960230.

The spelling of 56222161 in words is "fifty-six million, two hundred twenty-two thousand, one hundred sixty-one".