42216312 has 32 divisors (see below), whose sum is σ = 106088400. Its totient is φ = 13999104.

The previous prime is 42216311. The next prime is 42216341. The reversal of 42216312 is 21361224.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42216311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 264 + ... + 9192.

Almost surely, 2^42216312 is an apocalyptic number.

It is an amenable number.

42216312 is an abundant number, since it is smaller than the sum of its proper divisors (63872088).

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

42216312 is a wasteful number, since it uses less digits than its factorization.

42216312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9135 (or 9131 counting only the distinct ones).

The product of its digits is 576, while the sum is 21.

The square root of 42216312 is about 6497.4080986190. The cubic root of 42216312 is about 348.1983939429.

Adding to 42216312 its reverse (21361224), we get a palindrome (63577536).

The spelling of 42216312 in words is "forty-two million, two hundred sixteen thousand, three hundred twelve".