229725522 has 144 divisors (see below), whose sum is σ = 590029440. Its totient is φ = 64157184.

The previous prime is 229725521. The next prime is 229725547. The reversal of 229725522 is 225527922.

229725522 is a `hidden beast` number, since 22 + 97 + 25 + 522 = 666.

229725522 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (229725521) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 2907879 + ... + 2907957.

Almost surely, 2^229725522 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 229725522, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (295014720).

229725522 is an abundant number, since it is smaller than the sum of its proper divisors (360303918).

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

229725522 is a wasteful number, since it uses less digits than its factorization.

229725522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 177 (or 157 counting only the distinct ones).

The product of its digits is 50400, while the sum is 36.

The square root of 229725522 is about 15156.6989150012. The cubic root of 229725522 is about 612.4487449544.

The spelling of 229725522 in words is "two hundred twenty-nine million, seven hundred twenty-five thousand, five hundred twenty-two".