56025809 has 4 divisors (see below), whose sum is σ = 64029504. Its totient is φ = 48022116.

The previous prime is 56025799. The next prime is 56025817. The reversal of 56025809 is 90852065.

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, and also an emirpimes, since its reverse is a distinct semiprime: 90852065 = 5 ⋅18170413.

It is a cyclic number.

It is not a de Polignac number, because 56025809 - 2⁸ = 56025553 is a prime.

It is not an unprimeable number, because it can be changed into a prime (56027809) 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, 4001837 + ... + 4001850.

It is an arithmetic number, because the mean of its divisors is an integer number (16007376).

Almost surely, 2^56025809 is an apocalyptic number.

It is an amenable number.

56025809 is a deficient number, since it is larger than the sum of its proper divisors (8003695).

56025809 is an equidigital number, since it uses as much as digits as its factorization.

56025809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8003694.

The product of its (nonzero) digits is 21600, while the sum is 35.

The square root of 56025809 is about 7485.0390112544. The cubic root of 56025809 is about 382.6450023381.

It can be divided in two parts, 5602 and 5809, that added together give a palindrome (11411).

The spelling of 56025809 in words is "fifty-six million, twenty-five thousand, eight hundred nine".