219089172 has 12 divisors (see below), whose sum is σ = 511208096. Its totient is φ = 73029720.

The previous prime is 219089131. The next prime is 219089177. The reversal of 219089172 is 271980912.

It is a tau number, because it is divible by the number of its divisors (12).

It is a self number, because there is not a number n which added to its sum of digits gives 219089172.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (219089177) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 9128704 + ... + 9128727.

Almost surely, 2^219089172 is an apocalyptic number.

It is an amenable number.

219089172 is an abundant number, since it is smaller than the sum of its proper divisors (292118924).

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

219089172 is a wasteful number, since it uses less digits than its factorization.

219089172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18257438 (or 18257436 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 39.

The square root of 219089172 is about 14801.6611229956. The cubic root of 219089172 is about 602.8468158147.

The spelling of 219089172 in words is "two hundred nineteen million, eighty-nine thousand, one hundred seventy-two".