229724399 has 16 divisors (see below), whose sum is σ = 242572320. Its totient is φ = 217257600.

The previous prime is 229724387. The next prime is 229724471. The reversal of 229724399 is 993427922.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-229724399 is a prime.

It is a super-2 number, since 2×229724399² = 105546598991822402, 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 (229724899) 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, 313037 + ... + 313769.

It is an arithmetic number, because the mean of its divisors is an integer number (15160770).

Almost surely, 2^229724399 is an apocalyptic number.

229724399 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

229724399 is a deficient number, since it is larger than the sum of its proper divisors (12847921).

229724399 is a wasteful number, since it uses less digits than its factorization.

229724399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 970.

The product of its digits is 489888, while the sum is 47.

The square root of 229724399 is about 15156.6618686306. The cubic root of 229724399 is about 612.4477469793.

The spelling of 229724399 in words is "two hundred twenty-nine million, seven hundred twenty-four thousand, three hundred ninety-nine".