56183581 has 2 divisors, whose sum is σ = 56183582. Its totient is φ = 56183580.

The previous prime is 56183557. The next prime is 56183593. The reversal of 56183581 is 18538165.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 45562500 + 10621081 = 6750^2 + 3259^2 .

It is a cyclic number.

It is not a de Polignac number, because 56183581 - 2¹¹ = 56181533 is a prime.

It is a super-2 number, since 2×56183581² = 6313189547967122, which contains 22 as substring.

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 56183581.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56183381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28091790 + 28091791.

It is an arithmetic number, because the mean of its divisors is an integer number (28091791).

Almost surely, 2^56183581 is an apocalyptic number.

It is an amenable number.

56183581 is a deficient number, since it is larger than the sum of its proper divisors (1).

56183581 is an equidigital number, since it uses as much as digits as its factorization.

56183581 is an evil number, because the sum of its binary digits is even.

The product of its digits is 28800, while the sum is 37.

The square root of 56183581 is about 7495.5707587882. The cubic root of 56183581 is about 383.0038493752.

The spelling of 56183581 in words is "fifty-six million, one hundred eighty-three thousand, five hundred eighty-one".