42218544 has 20 divisors (see below), whose sum is σ = 109064696. Its totient is φ = 14072832.

The previous prime is 42218537. The next prime is 42218563. The reversal of 42218544 is 44581224.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 439729 + ... + 439824.

Almost surely, 2^42218544 is an apocalyptic number.

It is an amenable number.

42218544 is an abundant number, since it is smaller than the sum of its proper divisors (66846152).

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

42218544 is a wasteful number, since it uses less digits than its factorization.

42218544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 879564 (or 879558 counting only the distinct ones).

The product of its digits is 10240, while the sum is 30.

The square root of 42218544 is about 6497.5798571468. The cubic root of 42218544 is about 348.2045303160.

Adding to 42218544 its reverse (44581224), we get a palindrome (86799768).

The spelling of 42218544 in words is "forty-two million, two hundred eighteen thousand, five hundred forty-four".