22555738 has 4 divisors (see below), whose sum is σ = 33833610. Its totient is φ = 11277868.

The previous prime is 22555727. The next prime is 22555739. The reversal of 22555738 is 83755522.

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

It can be written as a sum of positive squares in only one way, i.e., 22401289 + 154449 = 4733^2 + 393^2 .

It is a super-2 number, since 2×22555738² = 1017522633449288, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 22555697 and 22555706.

It is not an unprimeable number, because it can be changed into a prime (22555739) by changing a digit.

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, 5638933 + ... + 5638936.

Almost surely, 2^22555738 is an apocalyptic number.

22555738 is a deficient number, since it is larger than the sum of its proper divisors (11277872).

22555738 is a wasteful number, since it uses less digits than its factorization.

22555738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11277871.

The product of its digits is 84000, while the sum is 37.

The square root of 22555738 is about 4749.2881571873. The cubic root of 22555738 is about 282.5437340598.

The spelling of 22555738 in words is "twenty-two million, five hundred fifty-five thousand, seven hundred thirty-eight".