231222015 has 48 divisors (see below), whose sum is σ = 425973600. Its totient is φ = 115623936.

The previous prime is 231222011. The next prime is 231222023. The reversal of 231222015 is 510222132.

It is not a de Polignac number, because 231222015 - 2² = 231222011 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231222011) by changing a digit.

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 47 ways as a sum of consecutive naturals, for example, 312516 + ... + 313254.

It is an arithmetic number, because the mean of its divisors is an integer number (8874450).

Almost surely, 2^231222015 is an apocalyptic number.

231222015 is a deficient number, since it is larger than the sum of its proper divisors (194751585).

231222015 is a wasteful number, since it uses less digits than its factorization.

231222015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1176 (or 1173 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 231222015 is about 15205.9861567739. The cubic root of 231222015 is about 613.7757521587.

Adding to 231222015 its reverse (510222132), we get a palindrome (741444147).

The spelling of 231222015 in words is "two hundred thirty-one million, two hundred twenty-two thousand, fifteen".