229742221 has 8 divisors (see below), whose sum is σ = 234037440. Its totient is φ = 225486912.

The previous prime is 229742203. The next prime is 229742347. The reversal of 229742221 is 122247922.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 229742221 - 2⁹ = 229741709 is a prime.

It is a super-2 number, since 2×229742221² = 105562976220025682, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (229742021) 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, 1770 + ... + 21508.

It is an arithmetic number, because the mean of its divisors is an integer number (29254680).

Almost surely, 2^229742221 is an apocalyptic number.

It is an amenable number.

229742221 is a deficient number, since it is larger than the sum of its proper divisors (4295219).

229742221 is a wasteful number, since it uses less digits than its factorization.

229742221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19955.

The product of its digits is 8064, while the sum is 31.

The square root of 229742221 is about 15157.2497835194. The cubic root of 229742221 is about 612.4635844517.

The spelling of 229742221 in words is "two hundred twenty-nine million, seven hundred forty-two thousand, two hundred twenty-one".