42213144 has 32 divisors (see below), whose sum is σ = 107781120. Its totient is φ = 13771296.

The previous prime is 42213137. The next prime is 42213161. The reversal of 42213144 is 44131224.

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 42213144.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17584 + ... + 19839.

It is an arithmetic number, because the mean of its divisors is an integer number (3368160).

Almost surely, 2^42213144 is an apocalyptic number.

It is an amenable number.

42213144 is an abundant number, since it is smaller than the sum of its proper divisors (65567976).

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

42213144 is a wasteful number, since it uses less digits than its factorization.

42213144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37479 (or 37475 counting only the distinct ones).

The product of its digits is 768, while the sum is 21.

The square root of 42213144 is about 6497.1643045255. The cubic root of 42213144 is about 348.1896838807.

Adding to 42213144 its reverse (44131224), we get a palindrome (86344368).

The spelling of 42213144 in words is "forty-two million, two hundred thirteen thousand, one hundred forty-four".