42222724 has 12 divisors (see below), whose sum is σ = 76437900. Its totient is φ = 20383328.

The previous prime is 42222721. The next prime is 42222737. The reversal of 42222724 is 42722224.

It can be written as a sum of positive squares in 2 ways, for example, as 19009600 + 23213124 = 4360^2 + 4818^2 .

It is not an unprimeable number, because it can be changed into a prime (42222721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 181879 + ... + 182110.

It is an arithmetic number, because the mean of its divisors is an integer number (6369825).

Almost surely, 2^42222724 is an apocalyptic number.

It is an amenable number.

42222724 is a deficient number, since it is larger than the sum of its proper divisors (34215176).

42222724 is a wasteful number, since it uses less digits than its factorization.

42222724 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 364022 (or 364020 counting only the distinct ones).

The product of its digits is 3584, while the sum is 25.

The square root of 42222724 is about 6497.9015074099. The cubic root of 42222724 is about 348.2160216873.

Adding to 42222724 its reverse (42722224), we get a palindrome (84944948).

Subtracting 42222724 from its reverse (42722224), we obtain a triangular number (499500 = T₉₉₉).

The spelling of 42222724 in words is "forty-two million, two hundred twenty-two thousand, seven hundred twenty-four".