56011321 has 2 divisors, whose sum is σ = 56011322. Its totient is φ = 56011320.

The previous prime is 56011313. The next prime is 56011369. The reversal of 56011321 is 12311065.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 55353600 + 657721 = 7440^2 + 811^2 .

It is a cyclic number.

It is not a de Polignac number, because 56011321 - 2³ = 56011313 is a prime.

It is not a weakly prime, because it can be changed into another prime (56011381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28005660 + 28005661.

It is an arithmetic number, because the mean of its divisors is an integer number (28005661).

Almost surely, 2^56011321 is an apocalyptic number.

It is an amenable number.

56011321 is a deficient number, since it is larger than the sum of its proper divisors (1).

56011321 is an equidigital number, since it uses as much as digits as its factorization.

56011321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 180, while the sum is 19.

The square root of 56011321 is about 7484.0711514523. The cubic root of 56011321 is about 382.6120161196.

Adding to 56011321 its reverse (12311065), we get a palindrome (68322386).

It can be divided in two parts, 560 and 11321, that added together give a square (11881 = 109²).

The spelling of 56011321 in words is "fifty-six million, eleven thousand, three hundred twenty-one".