56521601 has 2 divisors, whose sum is σ = 56521602. Its totient is φ = 56521600.

The previous prime is 56521571. The next prime is 56521613. The reversal of 56521601 is 10612565.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 49014001 + 7507600 = 7001^2 + 2740^2 .

It is a cyclic number.

It is not a de Polignac number, because 56521601 - 2⁶ = 56521537 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (56521631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28260800 + 28260801.

It is an arithmetic number, because the mean of its divisors is an integer number (28260801).

Almost surely, 2^56521601 is an apocalyptic number.

It is an amenable number.

56521601 is a deficient number, since it is larger than the sum of its proper divisors (1).

56521601 is an equidigital number, since it uses as much as digits as its factorization.

56521601 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1800, while the sum is 26.

The square root of 56521601 is about 7518.0849290228. The cubic root of 56521601 is about 383.7704089985.

The spelling of 56521601 in words is "fifty-six million, five hundred twenty-one thousand, six hundred one".