218107472 has 20 divisors (see below), whose sum is σ = 461000256. Its totient is φ = 99139680.

The previous prime is 218107471. The next prime is 218107499. The reversal of 218107472 is 274701812.

It is a happy number.

It is a hoax number, since the sum of its digits (32) coincides with the sum of the digits of its distinct prime factors.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (218107471) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 619448 + ... + 619799.

Almost surely, 2^218107472 is an apocalyptic number.

218107472 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

218107472 is an abundant number, since it is smaller than the sum of its proper divisors (242892784).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

218107472 is a wasteful number, since it uses less digits than its factorization.

218107472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1239266 (or 1239260 counting only the distinct ones).

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

The square root of 218107472 is about 14768.4620729445. The cubic root of 218107472 is about 601.9450507786.

The spelling of 218107472 in words is "two hundred eighteen million, one hundred seven thousand, four hundred seventy-two".