56222981 has 2 divisors, whose sum is σ = 56222982. Its totient is φ = 56222980.

The previous prime is 56222953. The next prime is 56222987. The reversal of 56222981 is 18922265.

It is a happy number.

56222981 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 55204900 + 1018081 = 7430^2 + 1009^2 .

It is a cyclic number.

It is not a de Polignac number, because 56222981 - 2¹⁴ = 56206597 is a prime.

It is a super-2 number, since 2×56222981² = 6322047185052722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56222987) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28111490 + 28111491.

It is an arithmetic number, because the mean of its divisors is an integer number (28111491).

Almost surely, 2^56222981 is an apocalyptic number.

It is an amenable number.

56222981 is a deficient number, since it is larger than the sum of its proper divisors (1).

56222981 is an equidigital number, since it uses as much as digits as its factorization.

56222981 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 17280, while the sum is 35.

The square root of 56222981 is about 7498.1985169773. The cubic root of 56222981 is about 383.0933584766.

The spelling of 56222981 in words is "fifty-six million, two hundred twenty-two thousand, nine hundred eighty-one".