56819281 has 2 divisors, whose sum is σ = 56819282. Its totient is φ = 56819280.

The previous prime is 56819263. The next prime is 56819293. The reversal of 56819281 is 18291865.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 31979025 + 24840256 = 5655^2 + 4984^2 .

It is a cyclic number.

It is not a de Polignac number, because 56819281 - 2¹⁷ = 56688209 is a prime.

It is a super-2 number, since 2×56819281² = 6456861386713922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (56819201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28409640 + 28409641.

It is an arithmetic number, because the mean of its divisors is an integer number (28409641).

Almost surely, 2^56819281 is an apocalyptic number.

It is an amenable number.

56819281 is a deficient number, since it is larger than the sum of its proper divisors (1).

56819281 is an equidigital number, since it uses as much as digits as its factorization.

56819281 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 34560, while the sum is 40.

The square root of 56819281 is about 7537.8565255648. The cubic root of 56819281 is about 384.4429589756.

The spelling of 56819281 in words is "fifty-six million, eight hundred nineteen thousand, two hundred eighty-one".