56535209 has 4 divisors (see below), whose sum is σ = 56554320. Its totient is φ = 56516100.

The previous prime is 56535197. The next prime is 56535221. The reversal of 56535209 is 90253565.

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 an interprime number because it is at equal distance from previous prime (56535197) and next prime (56535221).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56535209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56535299) 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, 4067 + ... + 11384.

It is an arithmetic number, because the mean of its divisors is an integer number (14138580).

Almost surely, 2^56535209 is an apocalyptic number.

It is an amenable number.

56535209 is a deficient number, since it is larger than the sum of its proper divisors (19111).

56535209 is a wasteful number, since it uses less digits than its factorization.

56535209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19110.

The product of its (nonzero) digits is 40500, while the sum is 35.

The square root of 56535209 is about 7518.9898922661. The cubic root of 56535209 is about 383.8012050634.

The spelling of 56535209 in words is "fifty-six million, five hundred thirty-five thousand, two hundred nine".