56223809 has 8 divisors (see below), whose sum is σ = 56802600. Its totient is φ = 55648000.

The previous prime is 56223803. The next prime is 56223857. The reversal of 56223809 is 90832265.

It can be written as a sum of positive squares in 4 ways, for example, as 16785409 + 39438400 = 4097^2 + 6280^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 56223809 - 2¹⁶ = 56158273 is a prime.

It is a super-2 number, since 2×56223809² = 6322233396936962, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (56223803) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 59279 + ... + 60219.

It is an arithmetic number, because the mean of its divisors is an integer number (7100325).

Almost surely, 2^56223809 is an apocalyptic number.

It is an amenable number.

56223809 is a deficient number, since it is larger than the sum of its proper divisors (578791).

56223809 is a wasteful number, since it uses less digits than its factorization.

56223809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1491.

The product of its (nonzero) digits is 25920, while the sum is 35.

The square root of 56223809 is about 7498.2537300361. The cubic root of 56223809 is about 383.0952390821.

The spelling of 56223809 in words is "fifty-six million, two hundred twenty-three thousand, eight hundred nine".