56505533 has 4 divisors (see below), whose sum is σ = 64577760. Its totient is φ = 48433308.

The previous prime is 56505517. The next prime is 56505551. The reversal of 56505533 is 33550565.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 56505533 - 2⁴ = 56505517 is a prime.

It is a super-2 number, since 2×56505533² = 6385750519228178, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 56505533.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56502533) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4036103 + ... + 4036116.

It is an arithmetic number, because the mean of its divisors is an integer number (16144440).

Almost surely, 2^56505533 is an apocalyptic number.

It is an amenable number.

56505533 is a deficient number, since it is larger than the sum of its proper divisors (8072227).

56505533 is an equidigital number, since it uses as much as digits as its factorization.

56505533 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8072226.

The product of its (nonzero) digits is 33750, while the sum is 32.

The square root of 56505533 is about 7517.0162298614. The cubic root of 56505533 is about 383.7340393791.

The spelling of 56505533 in words is "fifty-six million, five hundred five thousand, five hundred thirty-three".