228331000 has 32 divisors (see below), whose sum is σ = 534296880. Its totient is φ = 91332000.

The previous prime is 228330953. The next prime is 228331001. The reversal of 228331000 is 133822.

It is a happy number.

It is a super-2 number, since 2×228331000² = 104270091122000000, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (228331001) 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, 113166 + ... + 115165.

Almost surely, 2^228331000 is an apocalyptic number.

228331000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

228331000 is an abundant number, since it is smaller than the sum of its proper divisors (305965880).

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

228331000 is a wasteful number, since it uses less digits than its factorization.

228331000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 228352 (or 228338 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 228331000 is about 15110.6254006907. The cubic root of 228331000 is about 611.2069626204.

Adding to 228331000 its reverse (133822), we get a palindrome (228464822).

The spelling of 228331000 in words is "two hundred twenty-eight million, three hundred thirty-one thousand".