42331224 has 128 divisors (see below), whose sum is σ = 126282240. Its totient is φ = 11692032.

The previous prime is 42331217. The next prime is 42331231. The reversal of 42331224 is 42213324.

It is an interprime number because it is at equal distance from previous prime (42331217) and next prime (42331231).

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 42331224.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 121819 + ... + 122165.

It is an arithmetic number, because the mean of its divisors is an integer number (986580).

Almost surely, 2^42331224 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 42331224, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (63141120).

42331224 is an abundant number, since it is smaller than the sum of its proper divisors (83951016).

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

42331224 is a wasteful number, since it uses less digits than its factorization.

42331224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 409 (or 405 counting only the distinct ones).

The product of its digits is 1152, while the sum is 21.

The square root of 42331224 is about 6506.2449999981. The cubic root of 42331224 is about 348.5140375305.

Adding to 42331224 its reverse (42213324), we get a palindrome (84544548).

The spelling of 42331224 in words is "forty-two million, three hundred thirty-one thousand, two hundred twenty-four".