51560581 has 2 divisors, whose sum is σ = 51560582. Its totient is φ = 51560580.

The previous prime is 51560567. The next prime is 51560591. The reversal of 51560581 is 18506515.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 48427681 + 3132900 = 6959^2 + 1770^2 .

It is a cyclic number.

It is not a de Polignac number, because 51560581 - 2¹⁷ = 51429509 is a prime.

It is a super-2 number, since 2×51560581² = 5316987026115122, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51560591) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25780290 + 25780291.

It is an arithmetic number, because the mean of its divisors is an integer number (25780291).

Almost surely, 2^51560581 is an apocalyptic number.

It is an amenable number.

51560581 is a deficient number, since it is larger than the sum of its proper divisors (1).

51560581 is an equidigital number, since it uses as much as digits as its factorization.

51560581 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6000, while the sum is 31.

The square root of 51560581 is about 7180.5696849205. The cubic root of 51560581 is about 372.1967707786.

The spelling of 51560581 in words is "fifty-one million, five hundred sixty thousand, five hundred eighty-one".