22216394 has 4 divisors (see below), whose sum is σ = 33324594. Its totient is φ = 11108196.

The previous prime is 22216387. The next prime is 22216409. The reversal of 22216394 is 49361222.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 49361222 = 2 ⋅24680611.

It can be written as a sum of positive squares in only one way, i.e., 17952169 + 4264225 = 4237^2 + 2065^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5554097 + ... + 5554100.

Almost surely, 2^22216394 is an apocalyptic number.

22216394 is a deficient number, since it is larger than the sum of its proper divisors (11108200).

22216394 is a wasteful number, since it uses less digits than its factorization.

22216394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11108199.

The product of its digits is 5184, while the sum is 29.

The square root of 22216394 is about 4713.4269910544. The cubic root of 22216394 is about 281.1196410532.

The spelling of 22216394 in words is "twenty-two million, two hundred sixteen thousand, three hundred ninety-four".