56221481 has 2 divisors, whose sum is σ = 56221482. Its totient is φ = 56221480.

The previous prime is 56221427. The next prime is 56221519. The reversal of 56221481 is 18412265.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 45225625 + 10995856 = 6725^2 + 3316^2 .

It is a cyclic number.

It is not a de Polignac number, because 56221481 - 2²² = 52027177 is a prime.

It is a super-2 number, since 2×56221481² = 6321709851666722, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (56221381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28110740 + 28110741.

It is an arithmetic number, because the mean of its divisors is an integer number (28110741).

Almost surely, 2^56221481 is an apocalyptic number.

It is an amenable number.

56221481 is a deficient number, since it is larger than the sum of its proper divisors (1).

56221481 is an equidigital number, since it uses as much as digits as its factorization.

56221481 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 56221481 is about 7498.0984922846. The cubic root of 56221481 is about 383.0899515355.

The spelling of 56221481 in words is "fifty-six million, two hundred twenty-one thousand, four hundred eighty-one".