56022581 has 2 divisors, whose sum is σ = 56022582. Its totient is φ = 56022580.

The previous prime is 56022569. The next prime is 56022647. The reversal of 56022581 is 18522065.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 53787556 + 2235025 = 7334^2 + 1495^2 .

It is a cyclic number.

It is not a de Polignac number, because 56022581 - 2⁶ = 56022517 is a prime.

It is a super-2 number, since 2×56022581² = 6277059163803122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56022541) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28011290 + 28011291.

It is an arithmetic number, because the mean of its divisors is an integer number (28011291).

Almost surely, 2^56022581 is an apocalyptic number.

It is an amenable number.

56022581 is a deficient number, since it is larger than the sum of its proper divisors (1).

56022581 is an equidigital number, since it uses as much as digits as its factorization.

56022581 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4800, while the sum is 29.

The square root of 56022581 is about 7484.8233780097. The cubic root of 56022581 is about 382.6376533335.

The spelling of 56022581 in words is "fifty-six million, twenty-two thousand, five hundred eighty-one".