218147270 has 24 divisors (see below), whose sum is σ = 431609472. Its totient is φ = 79325840.

The previous prime is 218147269. The next prime is 218147317. The reversal of 218147270 is 72741812.

It is a happy number.

It is an alternating number because its digits alternate between even and odd.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 88934 + ... + 91353.

It is an arithmetic number, because the mean of its divisors is an integer number (17983728).

Almost surely, 2^218147270 is an apocalyptic number.

218147270 is a deficient number, since it is larger than the sum of its proper divisors (213462202).

218147270 is a wasteful number, since it uses less digits than its factorization.

218147270 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 180316 (or 180305 counting only the distinct ones).

The product of its (nonzero) digits is 6272, while the sum is 32.

The square root of 218147270 is about 14769.8094097385. The cubic root of 218147270 is about 601.9816607916.

The spelling of 218147270 in words is "two hundred eighteen million, one hundred forty-seven thousand, two hundred seventy".