22251646 has 4 divisors (see below), whose sum is σ = 33377472. Its totient is φ = 11125822.

The previous prime is 22251631. The next prime is 22251653. The reversal of 22251646 is 64615222.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5562910 + ... + 5562913.

It is an arithmetic number, because the mean of its divisors is an integer number (8344368).

Almost surely, 2^22251646 is an apocalyptic number.

22251646 is a deficient number, since it is larger than the sum of its proper divisors (11125826).

22251646 is a wasteful number, since it uses less digits than its factorization.

22251646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11125825.

The product of its digits is 5760, while the sum is 28.

The square root of 22251646 is about 4717.1650384527. The cubic root of 22251646 is about 281.2682519184.

Adding to 22251646 its reverse (64615222), we get a palindrome (86866868).

The spelling of 22251646 in words is "twenty-two million, two hundred fifty-one thousand, six hundred forty-six".