229241991 has 16 divisors (see below), whose sum is σ = 353058048. Its totient is φ = 130761600.

The previous prime is 229241981. The next prime is 229242001. The reversal of 229241991 is 199142922.

It is an interprime number because it is at equal distance from previous prime (229241981) and next prime (229242001).

It is not a de Polignac number, because 229241991 - 2⁷ = 229241863 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (229241911) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 203755 + ... + 204876.

It is an arithmetic number, because the mean of its divisors is an integer number (22066128).

Almost surely, 2^229241991 is an apocalyptic number.

229241991 is a deficient number, since it is larger than the sum of its proper divisors (123816057).

229241991 is a wasteful number, since it uses less digits than its factorization.

229241991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 408662.

The product of its digits is 23328, while the sum is 39.

The square root of 229241991 is about 15140.7394469359. The cubic root of 229241991 is about 612.0187448870.

The spelling of 229241991 in words is "two hundred twenty-nine million, two hundred forty-one thousand, nine hundred ninety-one".