228621552 has 20 divisors (see below), whose sum is σ = 590605800. Its totient is φ = 76207168.

The previous prime is 228621539. The next prime is 228621553. The reversal of 228621552 is 255126822.

It is a happy number.

228621552 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (228621553) 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, 2381427 + ... + 2381522.

It is an arithmetic number, because the mean of its divisors is an integer number (29530290).

Almost surely, 2^228621552 is an apocalyptic number.

It is an amenable number.

228621552 is an abundant number, since it is smaller than the sum of its proper divisors (361984248).

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

228621552 is a wasteful number, since it uses less digits than its factorization.

228621552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4762960 (or 4762954 counting only the distinct ones).

The product of its digits is 19200, while the sum is 33.

The square root of 228621552 is about 15120.2365060868. The cubic root of 228621552 is about 611.4661070668.

The spelling of 228621552 in words is "two hundred twenty-eight million, six hundred twenty-one thousand, five hundred fifty-two".