56422181 has 2 divisors, whose sum is σ = 56422182. Its totient is φ = 56422180.

The previous prime is 56422169. The next prime is 56422183. The reversal of 56422181 is 18122465.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 55502500 + 919681 = 7450^2 + 959^2 .

It is a cyclic number.

It is not a de Polignac number, because 56422181 - 2⁶ = 56422117 is a prime.

It is a super-2 number, since 2×56422181² = 6366925017593522, which contains 22 as substring.

Together with 56422183, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56422183) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28211090 + 28211091.

It is an arithmetic number, because the mean of its divisors is an integer number (28211091).

Almost surely, 2^56422181 is an apocalyptic number.

It is an amenable number.

56422181 is a deficient number, since it is larger than the sum of its proper divisors (1).

56422181 is an equidigital number, since it uses as much as digits as its factorization.

56422181 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3840, while the sum is 29.

The square root of 56422181 is about 7511.4699626638. The cubic root of 56422181 is about 383.5452629413.

The spelling of 56422181 in words is "fifty-six million, four hundred twenty-two thousand, one hundred eighty-one".