56261281 has 2 divisors, whose sum is σ = 56261282. Its totient is φ = 56261280.

The previous prime is 56261273. The next prime is 56261287. The reversal of 56261281 is 18216265.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 31460881 + 24800400 = 5609^2 + 4980^2 .

It is a cyclic number.

It is not a de Polignac number, because 56261281 - 2³ = 56261273 is a prime.

It is a super-2 number, since 2×56261281² = 6330663479521922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (56261287) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28130640 + 28130641.

It is an arithmetic number, because the mean of its divisors is an integer number (28130641).

Almost surely, 2^56261281 is an apocalyptic number.

It is an amenable number.

56261281 is a deficient number, since it is larger than the sum of its proper divisors (1).

56261281 is an equidigital number, since it uses as much as digits as its factorization.

56261281 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5760, while the sum is 31.

The square root of 56261281 is about 7500.7520289635. The cubic root of 56261281 is about 383.1803285193.

The spelling of 56261281 in words is "fifty-six million, two hundred sixty-one thousand, two hundred eighty-one".