231712228 has 48 divisors (see below), whose sum is σ = 459099648. Its totient is φ = 101376000.

The previous prime is 231712219. The next prime is 231712231. The reversal of 231712228 is 822217132.

It is a junction number, because it is equal to n+sod(n) for n = 231712196 and 231712205.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 350218 + ... + 350878.

It is an arithmetic number, because the mean of its divisors is an integer number (9564576).

Almost surely, 2^231712228 is an apocalyptic number.

It is an amenable number.

231712228 is a deficient number, since it is larger than the sum of its proper divisors (227387420).

231712228 is a wasteful number, since it uses less digits than its factorization.

231712228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 964 (or 962 counting only the distinct ones).

The product of its digits is 2688, while the sum is 28.

The square root of 231712228 is about 15222.0967018345. The cubic root of 231712228 is about 614.2092006068.

The spelling of 231712228 in words is "two hundred thirty-one million, seven hundred twelve thousand, two hundred twenty-eight".