188213172 has 24 divisors (see below), whose sum is σ = 501902016. Its totient is φ = 53775168.

The previous prime is 188213159. The next prime is 188213213. The reversal of 188213172 is 271312881.

It is a super-2 number, since 2×188213172² = 70848396228603168, which contains 22 as substring.

It is a congruent number.

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, 1120233 + ... + 1120400.

It is an arithmetic number, because the mean of its divisors is an integer number (20912584).

Almost surely, 2^188213172 is an apocalyptic number.

188213172 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

188213172 is an abundant number, since it is smaller than the sum of its proper divisors (313688844).

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

188213172 is a wasteful number, since it uses less digits than its factorization.

188213172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2240647 (or 2240645 counting only the distinct ones).

The product of its digits is 5376, while the sum is 33.

The square root of 188213172 is about 13719.0805814384. The cubic root of 188213172 is about 573.0818726306.

The spelling of 188213172 in words is "one hundred eighty-eight million, two hundred thirteen thousand, one hundred seventy-two".