56435521 has 2 divisors, whose sum is σ = 56435522. Its totient is φ = 56435520.

The previous prime is 56435501. The next prime is 56435543. The reversal of 56435521 is 12553465.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 48233025 + 8202496 = 6945^2 + 2864^2 .

It is a cyclic number.

It is not a de Polignac number, because 56435521 - 2⁹ = 56435009 is a prime.

It is not a weakly prime, because it can be changed into another prime (56435501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28217760 + 28217761.

It is an arithmetic number, because the mean of its divisors is an integer number (28217761).

Almost surely, 2^56435521 is an apocalyptic number.

It is an amenable number.

56435521 is a deficient number, since it is larger than the sum of its proper divisors (1).

56435521 is an equidigital number, since it uses as much as digits as its factorization.

56435521 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18000, while the sum is 31.

The square root of 56435521 is about 7512.3578855110. The cubic root of 56435521 is about 383.5754879966.

Adding to 56435521 its reverse (12553465), we get a palindrome (68988986).

The spelling of 56435521 in words is "fifty-six million, four hundred thirty-five thousand, five hundred twenty-one".