228579531 has 8 divisors (see below), whose sum is σ = 304856784. Its totient is φ = 152344320.

The previous prime is 228579493. The next prime is 228579577. The reversal of 228579531 is 135975822.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 228579531 - 2⁹ = 228579019 is a prime.

It is a super-2 number, since 2×228579531² = 104497203984359922, which contains 22 as substring.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (228579581) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5791 + ... + 22151.

It is an arithmetic number, because the mean of its divisors is an integer number (38107098).

Almost surely, 2^228579531 is an apocalyptic number.

228579531 is a deficient number, since it is larger than the sum of its proper divisors (76277253).

228579531 is a wasteful number, since it uses less digits than its factorization.

228579531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21021.

The product of its digits is 151200, while the sum is 42.

The square root of 228579531 is about 15118.8468806321. The cubic root of 228579531 is about 611.4286419613.

The spelling of 228579531 in words is "two hundred twenty-eight million, five hundred seventy-nine thousand, five hundred thirty-one".