56140561 has 2 divisors, whose sum is σ = 56140562. Its totient is φ = 56140560.

The previous prime is 56140543. The next prime is 56140583. The reversal of 56140561 is 16504165.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 51051025 + 5089536 = 7145^2 + 2256^2 .

It is a cyclic number.

It is not a de Polignac number, because 56140561 - 2²⁵ = 22586129 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (56140501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28070280 + 28070281.

It is an arithmetic number, because the mean of its divisors is an integer number (28070281).

Almost surely, 2^56140561 is an apocalyptic number.

It is an amenable number.

56140561 is a deficient number, since it is larger than the sum of its proper divisors (1).

56140561 is an equidigital number, since it uses as much as digits as its factorization.

56140561 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3600, while the sum is 28.

The square root of 56140561 is about 7492.7005145008. The cubic root of 56140561 is about 382.9060685374.

The spelling of 56140561 in words is "fifty-six million, one hundred forty thousand, five hundred sixty-one".