218472972 has 48 divisors (see below), whose sum is σ = 516593280. Its totient is φ = 71857152.

The previous prime is 218472949. The next prime is 218472977. The reversal of 218472972 is 279274812.

It is not an unprimeable number, because it can be changed into a prime (218472977) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 378348 + ... + 378924.

It is an arithmetic number, because the mean of its divisors is an integer number (10762360).

Almost surely, 2^218472972 is an apocalyptic number.

It is an amenable number.

218472972 is an abundant number, since it is smaller than the sum of its proper divisors (298120308).

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

218472972 is a wasteful number, since it uses less digits than its factorization.

218472972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 950 (or 948 counting only the distinct ones).

The product of its digits is 112896, while the sum is 42.

The square root of 218472972 is about 14780.8312350828. The cubic root of 218472972 is about 602.2811054947.

The spelling of 218472972 in words is "two hundred eighteen million, four hundred seventy-two thousand, nine hundred seventy-two".