218438854 has 4 divisors (see below), whose sum is σ = 327658284. Its totient is φ = 109219426.

The previous prime is 218438851. The next prime is 218438863. The reversal of 218438854 is 458834812.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a self number, because there is not a number n which added to its sum of digits gives 218438854.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (218438851) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54609712 + ... + 54609715.

It is an arithmetic number, because the mean of its divisors is an integer number (81914571).

Almost surely, 2^218438854 is an apocalyptic number.

218438854 is a deficient number, since it is larger than the sum of its proper divisors (109219430).

218438854 is a wasteful number, since it uses less digits than its factorization.

218438854 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109219429.

The product of its digits is 245760, while the sum is 43.

The square root of 218438854 is about 14779.6770600714. The cubic root of 218438854 is about 602.2497519649.

The spelling of 218438854 in words is "two hundred eighteen million, four hundred thirty-eight thousand, eight hundred fifty-four".