221832190 has 8 divisors (see below), whose sum is σ = 399297960. Its totient is φ = 88732872.

The previous prime is 221832157. The next prime is 221832197. The reversal of 221832190 is 91238122.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×221832190² = 98419041040392200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221832197) 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, 11091600 + ... + 11091619.

It is an arithmetic number, because the mean of its divisors is an integer number (49912245).

Almost surely, 2^221832190 is an apocalyptic number.

221832190 is a deficient number, since it is larger than the sum of its proper divisors (177465770).

221832190 is a wasteful number, since it uses less digits than its factorization.

221832190 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22183226.

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 221832190 is about 14894.0320262849. The cubic root of 221832190 is about 605.3522889613.

The spelling of 221832190 in words is "two hundred twenty-one million, eight hundred thirty-two thousand, one hundred ninety".