231330212250 has 32 divisors (see below), whose sum is σ = 577400211648. Its totient is φ = 61688056400.

The previous prime is 231330212249. The next prime is 231330212339. The reversal of 231330212250 is 52212033132.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 231330212250.

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, 154219392 + ... + 154220891.

It is an arithmetic number, because the mean of its divisors is an integer number (18043756614).

Almost surely, 2^231330212250 is an apocalyptic number.

231330212250 is an abundant number, since it is smaller than the sum of its proper divisors (346069999398).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

231330212250 is a wasteful number, since it uses less digits than its factorization.

231330212250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 308440303 (or 308440293 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 24.

Adding to 231330212250 its reverse (52212033132), we get a palindrome (283542245382).

The spelling of 231330212250 in words is "two hundred thirty-one billion, three hundred thirty million, two hundred twelve thousand, two hundred fifty".