56321261 has 2 divisors, whose sum is σ = 56321262. Its totient is φ = 56321260.

The previous prime is 56321257. The next prime is 56321297. The reversal of 56321261 is 16212365.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 52345225 + 3976036 = 7235^2 + 1994^2 .

It is a cyclic number.

It is not a de Polignac number, because 56321261 - 2² = 56321257 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 56321261.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56321201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28160630 + 28160631.

It is an arithmetic number, because the mean of its divisors is an integer number (28160631).

Almost surely, 2^56321261 is an apocalyptic number.

It is an amenable number.

56321261 is a deficient number, since it is larger than the sum of its proper divisors (1).

56321261 is an equidigital number, since it uses as much as digits as its factorization.

56321261 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2160, while the sum is 26.

The square root of 56321261 is about 7504.7492296545. The cubic root of 56321261 is about 383.3164493299.

The spelling of 56321261 in words is "fifty-six million, three hundred twenty-one thousand, two hundred sixty-one".