229911972 has 12 divisors (see below), whose sum is σ = 536461296. Its totient is φ = 76637320.

The previous prime is 229911931. The next prime is 229911973. The reversal of 229911972 is 279119922.

229911972 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (229911973) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9579654 + ... + 9579677.

It is an arithmetic number, because the mean of its divisors is an integer number (44705108).

Almost surely, 2^229911972 is an apocalyptic number.

It is an amenable number.

229911972 is an abundant number, since it is smaller than the sum of its proper divisors (306549324).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

229911972 is a wasteful number, since it uses less digits than its factorization.

229911972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19159338 (or 19159336 counting only the distinct ones).

The product of its digits is 40824, while the sum is 42.

The square root of 229911972 is about 15162.8484131445. The cubic root of 229911972 is about 612.6143921844.

The spelling of 229911972 in words is "two hundred twenty-nine million, nine hundred eleven thousand, nine hundred seventy-two".