228133572 has 12 divisors (see below), whose sum is σ = 532311696. Its totient is φ = 76044520.

The previous prime is 228133559. The next prime is 228133583. The reversal of 228133572 is 275331822.

228133572 is digitally balanced in base 3, because in such base 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 an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9505554 + ... + 9505577.

It is an arithmetic number, because the mean of its divisors is an integer number (44359308).

Almost surely, 2^228133572 is an apocalyptic number.

It is an amenable number.

228133572 is an abundant number, since it is smaller than the sum of its proper divisors (304178124).

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

228133572 is a wasteful number, since it uses less digits than its factorization.

228133572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19011138 (or 19011136 counting only the distinct ones).

The product of its digits is 20160, while the sum is 33.

The square root of 228133572 is about 15104.0912338346. The cubic root of 228133572 is about 611.0307503611.

It can be divided in two parts, 2281 and 33572, that added together give a palindrome (35853).

The spelling of 228133572 in words is "two hundred twenty-eight million, one hundred thirty-three thousand, five hundred seventy-two".