22556986 has 4 divisors (see below), whose sum is σ = 33835482. Its totient is φ = 11278492.

The previous prime is 22556923. The next prime is 22556999. The reversal of 22556986 is 68965522.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 68965522 = 2 ⋅34482761.

It can be written as a sum of positive squares in only one way, i.e., 22325625 + 231361 = 4725^2 + 481^2 .

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 as a sum of consecutive naturals, namely, 5639245 + ... + 5639248.

Almost surely, 2^22556986 is an apocalyptic number.

22556986 is a deficient number, since it is larger than the sum of its proper divisors (11278496).

22556986 is a wasteful number, since it uses less digits than its factorization.

22556986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11278495.

The product of its digits is 259200, while the sum is 43.

The square root of 22556986 is about 4749.4195434811. The cubic root of 22556986 is about 282.5489449745.

The spelling of 22556986 in words is "twenty-two million, five hundred fifty-six thousand, nine hundred eighty-six".