231303428 has 48 divisors (see below), whose sum is σ = 443847600. Its totient is φ = 105025536.

The previous prime is 231303419. The next prime is 231303439. The reversal of 231303428 is 824303132.

It can be written as a sum of positive squares in 8 ways, for example, as 5161984 + 226141444 = 2272^2 + 15038^2 .

It is a junction number, because it is equal to n+sod(n) for n = 231303397 and 231303406.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 374576 + ... + 375192.

It is an arithmetic number, because the mean of its divisors is an integer number (9246825).

Almost surely, 2^231303428 is an apocalyptic number.

It is an amenable number.

231303428 is a deficient number, since it is larger than the sum of its proper divisors (212544172).

231303428 is a wasteful number, since it uses less digits than its factorization.

231303428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 824 (or 822 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 26.

The square root of 231303428 is about 15208.6629261089. The cubic root of 231303428 is about 613.8477802796.

The spelling of 231303428 in words is "two hundred thirty-one million, three hundred three thousand, four hundred twenty-eight".