42216994 has 4 divisors (see below), whose sum is σ = 63325494. Its totient is φ = 21108496.

The previous prime is 42216989. The next prime is 42217039. The reversal of 42216994 is 49961224.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 40487769 + 1729225 = 6363^2 + 1315^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10554247 + ... + 10554250.

Almost surely, 2^42216994 is an apocalyptic number.

42216994 is a deficient number, since it is larger than the sum of its proper divisors (21108500).

42216994 is a wasteful number, since it uses less digits than its factorization.

42216994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21108499.

The product of its digits is 31104, while the sum is 37.

The square root of 42216994 is about 6497.4605808731. The cubic root of 42216994 is about 348.2002689687.

The spelling of 42216994 in words is "forty-two million, two hundred sixteen thousand, nine hundred ninety-four".