231222530 has 48 divisors (see below), whose sum is σ = 522849600. Its totient is φ = 72066720.

The previous prime is 231222503. The next prime is 231222547. The reversal of 231222530 is 35222132.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5180 + ... + 22119.

It is an arithmetic number, because the mean of its divisors is an integer number (10892700).

Almost surely, 2^231222530 is an apocalyptic number.

231222530 is an abundant number, since it is smaller than the sum of its proper divisors (291627070).

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

231222530 is a wasteful number, since it uses less digits than its factorization.

231222530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27335 (or 27324 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 231222530 is about 15206.0030908849. The cubic root of 231222530 is about 613.7762078452.

Adding to 231222530 its reverse (35222132), we get a palindrome (266444662).

It can be divided in two parts, 23122 and 2530, that added together give a palindrome (25652).

The spelling of 231222530 in words is "two hundred thirty-one million, two hundred twenty-two thousand, five hundred thirty".