231000345 has 48 divisors (see below), whose sum is σ = 408844800. Its totient is φ = 120631680.

The previous prime is 231000323. The next prime is 231000353. The reversal of 231000345 is 543000132.

It is not a de Polignac number, because 231000345 - 2¹⁷ = 230869273 is a prime.

It is a super-2 number, since 2×231000345² = 106722318780238050, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 643276 + ... + 643634.

It is an arithmetic number, because the mean of its divisors is an integer number (8517600).

Almost surely, 2^231000345 is an apocalyptic number.

It is an amenable number.

231000345 is a deficient number, since it is larger than the sum of its proper divisors (177844455).

231000345 is a wasteful number, since it uses less digits than its factorization.

231000345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 630 (or 627 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 18.

The square root of 231000345 is about 15198.6955032332. The cubic root of 231000345 is about 613.5795494276.

Adding to 231000345 its reverse (543000132), we get a palindrome (774000477).

The spelling of 231000345 in words is "two hundred thirty-one million, three hundred forty-five", and thus it is an aban number.