22115554 has 4 divisors (see below), whose sum is σ = 33173334. Its totient is φ = 11057776.

The previous prime is 22115549. The next prime is 22115557. The reversal of 22115554 is 45551122.

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., 18792225 + 3323329 = 4335^2 + 1823^2 .

It is not an unprimeable number, because it can be changed into a prime (22115557) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5528887 + ... + 5528890.

Almost surely, 2^22115554 is an apocalyptic number.

22115554 is a deficient number, since it is larger than the sum of its proper divisors (11057780).

22115554 is a wasteful number, since it uses less digits than its factorization.

22115554 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11057779.

The product of its digits is 2000, while the sum is 25.

The square root of 22115554 is about 4702.7177248906. The cubic root of 22115554 is about 280.6936627767.

Adding to 22115554 its reverse (45551122), we get a palindrome (67666676).

The spelling of 22115554 in words is "twenty-two million, one hundred fifteen thousand, five hundred fifty-four".