56252009 has 4 divisors (see below), whose sum is σ = 61365840. Its totient is φ = 51138180.

The previous prime is 56251981. The next prime is 56252023. The reversal of 56252009 is 90025265.

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 a cyclic number.

It is not a de Polignac number, because 56252009 - 2⁸ = 56251753 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (56252059) 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, 2556899 + ... + 2556920.

It is an arithmetic number, because the mean of its divisors is an integer number (15341460).

Almost surely, 2^56252009 is an apocalyptic number.

It is an amenable number.

56252009 is a deficient number, since it is larger than the sum of its proper divisors (5113831).

56252009 is a wasteful number, since it uses less digits than its factorization.

56252009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5113830.

The product of its (nonzero) digits is 5400, while the sum is 29.

The square root of 56252009 is about 7500.1339321375. The cubic root of 56252009 is about 383.1592776703.

The spelling of 56252009 in words is "fifty-six million, two hundred fifty-two thousand, nine".