22290216 has 32 divisors (see below), whose sum is σ = 60012960. Its totient is φ = 6858432.

The previous prime is 22290199. The next prime is 22290227. The reversal of 22290216 is 61209222.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is an unprimeable number.

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, 35410 + ... + 36033.

It is an arithmetic number, because the mean of its divisors is an integer number (1875405).

Almost surely, 2^22290216 is an apocalyptic number.

22290216 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

22290216 is an abundant number, since it is smaller than the sum of its proper divisors (37722744).

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

22290216 is a wasteful number, since it uses less digits than its factorization.

22290216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71465 (or 71461 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 24.

The square root of 22290216 is about 4721.2515289910. The cubic root of 22290216 is about 281.4306706805.

Adding to 22290216 its reverse (61209222), we get a palindrome (83499438).

The spelling of 22290216 in words is "twenty-two million, two hundred ninety thousand, two hundred sixteen".