218134814 has 4 divisors (see below), whose sum is σ = 327202224. Its totient is φ = 109067406.

The previous prime is 218134811. The next prime is 218134823. The reversal of 218134814 is 418431812.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (218134811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54533702 + ... + 54533705.

It is an arithmetic number, because the mean of its divisors is an integer number (81800556).

Almost surely, 2^218134814 is an apocalyptic number.

218134814 is a deficient number, since it is larger than the sum of its proper divisors (109067410).

218134814 is a wasteful number, since it uses less digits than its factorization.

218134814 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109067409.

The product of its digits is 6144, while the sum is 32.

The square root of 218134814 is about 14769.3877327396. The cubic root of 218134814 is about 601.9702030483.

The spelling of 218134814 in words is "two hundred eighteen million, one hundred thirty-four thousand, eight hundred fourteen".