42213772 has 12 divisors (see below), whose sum is σ = 74024496. Its totient is φ = 21063920.

The previous prime is 42213761. The next prime is 42213779. The reversal of 42213772 is 27731224.

It is a self number, because there is not a number n which added to its sum of digits gives 42213772.

It is not an unprimeable number, because it can be changed into a prime (42213779) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8479 + ... + 12502.

It is an arithmetic number, because the mean of its divisors is an integer number (6168708).

Almost surely, 2^42213772 is an apocalyptic number.

It is an amenable number.

42213772 is a deficient number, since it is larger than the sum of its proper divisors (31810724).

42213772 is a wasteful number, since it uses less digits than its factorization.

42213772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21488 (or 21486 counting only the distinct ones).

The product of its digits is 4704, while the sum is 28.

The square root of 42213772 is about 6497.2126331220. The cubic root of 42213772 is about 348.1914105312.

Adding to 42213772 its reverse (27731224), we get a palindrome (69944996).

The spelling of 42213772 in words is "forty-two million, two hundred thirteen thousand, seven hundred seventy-two".