228121524 has 72 divisors (see below), whose sum is σ = 609336000. Its totient is φ = 71760384.

The previous prime is 228121519. The next prime is 228121541. The reversal of 228121524 is 425121822.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 245092 + ... + 246020.

It is an arithmetic number, because the mean of its divisors is an integer number (8463000).

Almost surely, 2^228121524 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 228121524, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (304668000).

228121524 is an abundant number, since it is smaller than the sum of its proper divisors (381214476).

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

228121524 is a wasteful number, since it uses less digits than its factorization.

228121524 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1317 (or 1312 counting only the distinct ones).

The product of its digits is 2560, while the sum is 27.

The square root of 228121524 is about 15103.6923962321. The cubic root of 228121524 is about 611.0199937563.

It can be divided in two parts, 22812 and 1524, that added together give a square (24336 = 156²).

The spelling of 228121524 in words is "two hundred twenty-eight million, one hundred twenty-one thousand, five hundred twenty-four".