42223212 has 18 divisors (see below), whose sum is σ = 106730988. Its totient is φ = 14074392.

The previous prime is 42223201. The next prime is 42223213. The reversal of 42223212 is 21232224.

42223212 is a `hidden beast` number, since 422 + 232 + 12 = 666.

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (18).

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

It is not an unprimeable number, because it can be changed into a prime (42223213) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 586398 + ... + 586469.

Almost surely, 2^42223212 is an apocalyptic number.

It is an amenable number.

42223212 is an abundant number, since it is smaller than the sum of its proper divisors (64507776).

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

42223212 is a wasteful number, since it uses less digits than its factorization.

42223212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1172877 (or 1172872 counting only the distinct ones).

The product of its digits is 384, while the sum is 18.

The square root of 42223212 is about 6497.9390578860. The cubic root of 42223212 is about 348.2173632143.

Adding to 42223212 its reverse (21232224), we get a palindrome (63455436).

The spelling of 42223212 in words is "forty-two million, two hundred twenty-three thousand, two hundred twelve".