231075225 has 18 divisors (see below), whose sum is σ = 413881806. Its totient is φ = 123240000.

The previous prime is 231075197. The next prime is 231075253. The reversal of 231075225 is 522570132.

It is an interprime number because it is at equal distance from previous prime (231075197) and next prime (231075253).

It can be written as a sum of positive squares in 3 ways, for example, as 1734489 + 229340736 = 1317^2 + 15144^2 .

It is not a de Polignac number, because 231075225 - 2¹⁶ = 231009689 is a prime.

It is a Smith number, since the sum of its digits (27) coincides with the sum of the digits of its prime factors.

It is a zygodrome in base 14.

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 17 ways as a sum of consecutive naturals, for example, 513276 + ... + 513725.

Almost surely, 2^231075225 is an apocalyptic number.

231075225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

231075225 is a deficient number, since it is larger than the sum of its proper divisors (182806581).

231075225 is a wasteful number, since it uses less digits than its factorization.

231075225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1027017 (or 1027009 counting only the distinct ones).

The product of its (nonzero) digits is 4200, while the sum is 27.

The square root of 231075225 is about 15201.1586729433. The cubic root of 231075225 is about 613.6458406318.

The spelling of 231075225 in words is "two hundred thirty-one million, seventy-five thousand, two hundred twenty-five".