56367221 has 2 divisors, whose sum is σ = 56367222. Its totient is φ = 56367220.

The previous prime is 56367217. The next prime is 56367247. The reversal of 56367221 is 12276365.

56367221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 31516996 + 24850225 = 5614^2 + 4985^2 .

It is a cyclic number.

It is not a de Polignac number, because 56367221 - 2² = 56367217 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56307221) 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, 28183610 + 28183611.

It is an arithmetic number, because the mean of its divisors is an integer number (28183611).

Almost surely, 2^56367221 is an apocalyptic number.

It is an amenable number.

56367221 is a deficient number, since it is larger than the sum of its proper divisors (1).

56367221 is an equidigital number, since it uses as much as digits as its factorization.

56367221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15120, while the sum is 32.

The square root of 56367221 is about 7507.8106662329. The cubic root of 56367221 is about 383.4206872547.

The spelling of 56367221 in words is "fifty-six million, three hundred sixty-seven thousand, two hundred twenty-one".