56445218 has 4 divisors (see below), whose sum is σ = 84667830. Its totient is φ = 28222608.

The previous prime is 56445187. The next prime is 56445227. The reversal of 56445218 is 81254465.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 81254465 = 5 ⋅16250893.

It can be written as a sum of positive squares in only one way, i.e., 56445169 + 49 = 7513^2 + 7^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14111303 + ... + 14111306.

Almost surely, 2^56445218 is an apocalyptic number.

56445218 is a deficient number, since it is larger than the sum of its proper divisors (28222612).

56445218 is a wasteful number, since it uses less digits than its factorization.

56445218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28222611.

The product of its digits is 38400, while the sum is 35.

The square root of 56445218 is about 7513.0032610135. The cubic root of 56445218 is about 383.5974559488.

The spelling of 56445218 in words is "fifty-six million, four hundred forty-five thousand, two hundred eighteen".