42216774 has 8 divisors (see below), whose sum is σ = 84433560. Its totient is φ = 14072256.

The previous prime is 42216751. The next prime is 42216781. The reversal of 42216774 is 47761224.

It is a sphenic number, since it is the product of 3 distinct primes.

42216774 is an admirable number.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

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, 3518059 + ... + 3518070.

It is an arithmetic number, because the mean of its divisors is an integer number (10554195).

Almost surely, 2^42216774 is an apocalyptic number.

42216774 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

42216774 is a wasteful number, since it uses less digits than its factorization.

42216774 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7036134.

The product of its digits is 18816, while the sum is 33.

The square root of 42216774 is about 6497.4436511600. The cubic root of 42216774 is about 348.1996641239.

Adding to 42216774 its reverse (47761224), we get a palindrome (89977998).

The spelling of 42216774 in words is "forty-two million, two hundred sixteen thousand, seven hundred seventy-four".