229149921 has 72 divisors (see below), whose sum is σ = 421139712. Its totient is φ = 109771200.

The previous prime is 229149913. The next prime is 229149941. The reversal of 229149921 is 129941922.

It is not a de Polignac number, because 229149921 - 2³ = 229149913 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 229149921.

It is not an unprimeable number, because it can be changed into a prime (229149941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 230736 + ... + 231726.

Almost surely, 2^229149921 is an apocalyptic number.

229149921 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

229149921 is a deficient number, since it is larger than the sum of its proper divisors (191989791).

229149921 is a wasteful number, since it uses less digits than its factorization.

229149921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1043 (or 1025 counting only the distinct ones).

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

The square root of 229149921 is about 15137.6986692165. The cubic root of 229149921 is about 611.9367992961.

The spelling of 229149921 in words is "two hundred twenty-nine million, one hundred forty-nine thousand, nine hundred twenty-one".