229799991 has 8 divisors (see below), whose sum is σ = 306488944. Its totient is φ = 153155520.

The previous prime is 229799989. The next prime is 229800001. The reversal of 229799991 is 199997922.

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

It is not a de Polignac number, because 229799991 - 2¹ = 229799989 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (229799951) 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, 3795 + ... + 21771.

It is an arithmetic number, because the mean of its divisors is an integer number (38311118).

Almost surely, 2^229799991 is an apocalyptic number.

229799991 is a deficient number, since it is larger than the sum of its proper divisors (76688953).

229799991 is a wasteful number, since it uses less digits than its factorization.

229799991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22241.

The product of its digits is 1653372, while the sum is 57.

The square root of 229799991 is about 15159.1553524595. The cubic root of 229799991 is about 612.5149159772.

The spelling of 229799991 in words is "two hundred twenty-nine million, seven hundred ninety-nine thousand, nine hundred ninety-one".