56218353 has 4 divisors (see below), whose sum is σ = 74957808. Its totient is φ = 37478900.

The previous prime is 56218333. The next prime is 56218369. The reversal of 56218353 is 35381265.

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 56218353 - 2⁹ = 56217841 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (56218313) 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, 9369723 + ... + 9369728.

It is an arithmetic number, because the mean of its divisors is an integer number (18739452).

Almost surely, 2^56218353 is an apocalyptic number.

It is an amenable number.

56218353 is a deficient number, since it is larger than the sum of its proper divisors (18739455).

56218353 is a wasteful number, since it uses less digits than its factorization.

56218353 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18739454.

The product of its digits is 21600, while the sum is 33.

The square root of 56218353 is about 7497.8899031661. The cubic root of 56218353 is about 383.0828467328.

It can be divided in two parts, 562 and 18353, that added together give a triangular number (18915 = T₁₉₄).

The spelling of 56218353 in words is "fifty-six million, two hundred eighteen thousand, three hundred fifty-three".