56436218 has 4 divisors (see below), whose sum is σ = 84654330. Its totient is φ = 28218108.

The previous prime is 56436217. The next prime is 56436223. The reversal of 56436218 is 81263465.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 81263465 = 5 ⋅16252693.

It can be written as a sum of positive squares in only one way, i.e., 36517849 + 19918369 = 6043^2 + 4463^2 .

It is not an unprimeable number, because it can be changed into a prime (56436217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14109053 + ... + 14109056.

Almost surely, 2^56436218 is an apocalyptic number.

56436218 is a deficient number, since it is larger than the sum of its proper divisors (28218112).

56436218 is a wasteful number, since it uses less digits than its factorization.

56436218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28218111.

The product of its digits is 34560, while the sum is 35.

The square root of 56436218 is about 7512.4042755965. The cubic root of 56436218 is about 383.5770670908.

The spelling of 56436218 in words is "fifty-six million, four hundred thirty-six thousand, two hundred eighteen".