231002225 has 12 divisors (see below), whose sum is σ = 298897536. Its totient is φ = 176766480.

The previous prime is 231002221. The next prime is 231002267. The reversal of 231002225 is 522200132.

It is not a de Polignac number, because 231002225 - 2² = 231002221 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (231002221) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 200297 + ... + 201446.

It is an arithmetic number, because the mean of its divisors is an integer number (24908128).

Almost surely, 2^231002225 is an apocalyptic number.

231002225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

231002225 is a deficient number, since it is larger than the sum of its proper divisors (67895311).

231002225 is a wasteful number, since it uses less digits than its factorization.

231002225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 401776 (or 401771 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 17.

The square root of 231002225 is about 15198.7573505205. The cubic root of 231002225 is about 613.5812139654.

Adding to 231002225 its reverse (522200132), we get a palindrome (753202357).

The spelling of 231002225 in words is "two hundred thirty-one million, two thousand, two hundred twenty-five".