221130189 has 72 divisors (see below), whose sum is σ = 403067520. Its totient is φ = 119451024.

The previous prime is 221130187. The next prime is 221130199. The reversal of 221130189 is 981031122.

It is not a de Polignac number, because 221130189 - 2¹ = 221130187 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221130187) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 477372 + ... + 477834.

It is an arithmetic number, because the mean of its divisors is an integer number (5598160).

Almost surely, 2^221130189 is an apocalyptic number.

It is an amenable number.

221130189 is a deficient number, since it is larger than the sum of its proper divisors (181937331).

221130189 is a wasteful number, since it uses less digits than its factorization.

221130189 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 524 (or 492 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 27.

The square root of 221130189 is about 14870.4468325602. The cubic root of 221130189 is about 604.7130565606.

It can be divided in two parts, 2211 and 30189, that added together give a square (32400 = 180²).

The spelling of 221130189 in words is "two hundred twenty-one million, one hundred thirty thousand, one hundred eighty-nine".