56019521 has 2 divisors, whose sum is σ = 56019522. Its totient is φ = 56019520.

The previous prime is 56019499. The next prime is 56019527. The reversal of 56019521 is 12591065.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 53129521 + 2890000 = 7289^2 + 1700^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56019521 is a prime.

It is not a weakly prime, because it can be changed into another prime (56019527) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28009760 + 28009761.

It is an arithmetic number, because the mean of its divisors is an integer number (28009761).

Almost surely, 2^56019521 is an apocalyptic number.

It is an amenable number.

56019521 is a deficient number, since it is larger than the sum of its proper divisors (1).

56019521 is an equidigital number, since it uses as much as digits as its factorization.

56019521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2700, while the sum is 29.

The square root of 56019521 is about 7484.6189615771. The cubic root of 56019521 is about 382.6306865443.

The spelling of 56019521 in words is "fifty-six million, nineteen thousand, five hundred twenty-one".