56282581 has 2 divisors, whose sum is σ = 56282582. Its totient is φ = 56282580.

The previous prime is 56282557. The next prime is 56282593. The reversal of 56282581 is 18528265.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 46703556 + 9579025 = 6834^2 + 3095^2 .

It is a cyclic number.

It is not a de Polignac number, because 56282581 - 2¹³ = 56274389 is a prime.

It is a super-2 number, since 2×56282581² = 6335457848043122, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 56282581.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56282521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28141290 + 28141291.

It is an arithmetic number, because the mean of its divisors is an integer number (28141291).

Almost surely, 2^56282581 is an apocalyptic number.

It is an amenable number.

56282581 is a deficient number, since it is larger than the sum of its proper divisors (1).

56282581 is an equidigital number, since it uses as much as digits as its factorization.

56282581 is an evil number, because the sum of its binary digits is even.

The product of its digits is 38400, while the sum is 37.

The square root of 56282581 is about 7502.1717522328. The cubic root of 56282581 is about 383.2286785929.

The spelling of 56282581 in words is "fifty-six million, two hundred eighty-two thousand, five hundred eighty-one".