42222544 has 80 divisors (see below), whose sum is σ = 102993408. Its totient is φ = 16321536.

The previous prime is 42222539. The next prime is 42222559. The reversal of 42222544 is 44522224.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 68124 + ... + 68740.

Almost surely, 2^42222544 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 42222544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (51496704).

42222544 is an abundant number, since it is smaller than the sum of its proper divisors (60770864).

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

42222544 is a wasteful number, since it uses less digits than its factorization.

42222544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 692 (or 686 counting only the distinct ones).

The product of its digits is 5120, while the sum is 25.

The square root of 42222544 is about 6497.8876567697. The cubic root of 42222544 is about 348.2155268592.

Adding to 42222544 its reverse (44522224), we get a palindrome (86744768).

The spelling of 42222544 in words is "forty-two million, two hundred twenty-two thousand, five hundred forty-four".