22290556 has 6 divisors (see below), whose sum is σ = 39008480. Its totient is φ = 11145276.

The previous prime is 22290551. The next prime is 22290571. The reversal of 22290556 is 65509222.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22290551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2786316 + ... + 2786323.

Almost surely, 2^22290556 is an apocalyptic number.

It is an amenable number.

22290556 is a deficient number, since it is larger than the sum of its proper divisors (16717924).

22290556 is a wasteful number, since it uses less digits than its factorization.

22290556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5572643 (or 5572641 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 31.

The square root of 22290556 is about 4721.2875362553. The cubic root of 22290556 is about 281.4321015914.

Adding to 22290556 its reverse (65509222), we get a palindrome (87799778).

The spelling of 22290556 in words is "twenty-two million, two hundred ninety thousand, five hundred fifty-six".