231499228 has 12 divisors (see below), whose sum is σ = 419093640. Its totient is φ = 111758192.

The previous prime is 231499207. The next prime is 231499237. The reversal of 231499228 is 822994132.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 997726 + ... + 997957.

It is an arithmetic number, because the mean of its divisors is an integer number (34924470).

Almost surely, 2^231499228 is an apocalyptic number.

It is an amenable number.

231499228 is a deficient number, since it is larger than the sum of its proper divisors (187594412).

231499228 is a wasteful number, since it uses less digits than its factorization.

231499228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1995716 (or 1995714 counting only the distinct ones).

The product of its digits is 62208, while the sum is 40.

The square root of 231499228 is about 15215.0986851877. The cubic root of 231499228 is about 614.0209402684.

The spelling of 231499228 in words is "two hundred thirty-one million, four hundred ninety-nine thousand, two hundred twenty-eight".