2218390067172 has 24 divisors (see below), whose sum is σ = 5176278096192. Its totient is φ = 739458412000.

The previous prime is 2218390067167. The next prime is 2218390067213. The reversal of 2218390067172 is 2717600938122.

It is a happy number.

It is a super-3 number, since 3×2218390067172³ (a number of 38 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1558297 + ... + 2620127.

It is an arithmetic number, because the mean of its divisors is an integer number (215678254008).

Almost surely, 2^{2218390067172} is an apocalyptic number.

It is an amenable number.

2218390067172 is an abundant number, since it is smaller than the sum of its proper divisors (2957888029020).

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

2218390067172 is a wasteful number, since it uses less digits than its factorization.

2218390067172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1235939 (or 1235937 counting only the distinct ones).

The product of its (nonzero) digits is 508032, while the sum is 48.

The spelling of 2218390067172 in words is "two trillion, two hundred eighteen billion, three hundred ninety million, sixty-seven thousand, one hundred seventy-two".