56912321 has 2 divisors, whose sum is σ = 56912322. Its totient is φ = 56912320.

The previous prime is 56912293. The next prime is 56912357. The reversal of 56912321 is 12321965.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 50481025 + 6431296 = 7105^2 + 2536^2 .

It is a cyclic number.

It is not a de Polignac number, because 56912321 - 2¹⁰ = 56911297 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (56912371) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28456160 + 28456161.

It is an arithmetic number, because the mean of its divisors is an integer number (28456161).

Almost surely, 2^56912321 is an apocalyptic number.

It is an amenable number.

56912321 is a deficient number, since it is larger than the sum of its proper divisors (1).

56912321 is an equidigital number, since it uses as much as digits as its factorization.

56912321 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3240, while the sum is 29.

The square root of 56912321 is about 7544.0255169240. The cubic root of 56912321 is about 384.6526827798.

The spelling of 56912321 in words is "fifty-six million, nine hundred twelve thousand, three hundred twenty-one".