22005554 has 4 divisors (see below), whose sum is σ = 33008334. Its totient is φ = 11002776.

The previous prime is 22005539. The next prime is 22005559. The reversal of 22005554 is 45550022.

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., 17447329 + 4558225 = 4177^2 + 2135^2 .

It is a super-3 number, since 3×22005554³ (a number of 23 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (22005559) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5501387 + ... + 5501390.

Almost surely, 2^22005554 is an apocalyptic number.

22005554 is a deficient number, since it is larger than the sum of its proper divisors (11002780).

22005554 is a wasteful number, since it uses less digits than its factorization.

22005554 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11002779.

The product of its (nonzero) digits is 2000, while the sum is 23.

The square root of 22005554 is about 4691.0077808505. The cubic root of 22005554 is about 280.2275106671.

Adding to 22005554 its reverse (45550022), we get a palindrome (67555576).

The spelling of 22005554 in words is "twenty-two million, five thousand, five hundred fifty-four".