231222024 has 96 divisors (see below), whose sum is σ = 688465440. Its totient is φ = 69523200.

The previous prime is 231222023. The next prime is 231222031. The reversal of 231222024 is 420222132.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 231221988 and 231222006.

It is not an unprimeable number, because it can be changed into a prime (231222023) by changing a digit.

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, 107439 + ... + 109569.

It is an arithmetic number, because the mean of its divisors is an integer number (7171515).

Almost surely, 2^231222024 is an apocalyptic number.

231222024 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 231222024, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (344232720).

231222024 is an abundant number, since it is smaller than the sum of its proper divisors (457243416).

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

231222024 is a wasteful number, since it uses less digits than its factorization.

231222024 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2291 (or 2284 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 231222024 is about 15205.9864527100. The cubic root of 231222024 is about 613.7757601221.

Adding to 231222024 its reverse (420222132), we get a palindrome (651444156).

It can be divided in two parts, 2312 and 22024, that added together give a square (24336 = 156²).

The spelling of 231222024 in words is "two hundred thirty-one million, two hundred twenty-two thousand, twenty-four".