56218173 has 12 divisors (see below), whose sum is σ = 82391904. Its totient is φ = 34071400.

The previous prime is 56218171. The next prime is 56218181. The reversal of 56218173 is 37181265.

It is not a de Polignac number, because 56218173 - 2¹ = 56218171 is a prime.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56218171) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 77073 + ... + 77798.

It is an arithmetic number, because the mean of its divisors is an integer number (6865992).

Almost surely, 2^56218173 is an apocalyptic number.

It is an amenable number.

56218173 is a deficient number, since it is larger than the sum of its proper divisors (26173731).

56218173 is a wasteful number, since it uses less digits than its factorization.

56218173 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 154896 (or 154885 counting only the distinct ones).

The product of its digits is 10080, while the sum is 33.

The square root of 56218173 is about 7497.8778997794. The cubic root of 56218173 is about 383.0824378807.

The spelling of 56218173 in words is "fifty-six million, two hundred eighteen thousand, one hundred seventy-three".