229190221 has 8 divisors (see below), whose sum is σ = 246954680. Its totient is φ = 211444992.

The previous prime is 229190207. The next prime is 229190231. The reversal of 229190221 is 122091922.

229190221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 33582025 + 195608196 = 5795^2 + 13986^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-229190221 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 229190221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (229190231) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28585 + ... + 35713.

It is an arithmetic number, because the mean of its divisors is an integer number (30869335).

Almost surely, 2^229190221 is an apocalyptic number.

It is an amenable number.

229190221 is a deficient number, since it is larger than the sum of its proper divisors (17764459).

229190221 is a wasteful number, since it uses less digits than its factorization.

229190221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9615.

The product of its (nonzero) digits is 1296, while the sum is 28.

The square root of 229190221 is about 15139.0297245233. The cubic root of 229190221 is about 611.9726704372.

The spelling of 229190221 in words is "two hundred twenty-nine million, one hundred ninety thousand, two hundred twenty-one".