22400055 has 24 divisors (see below), whose sum is σ = 39324480. Its totient is φ = 11793600.

The previous prime is 22400051. The next prime is 22400057. The reversal of 22400055 is 55000422.

It is not a de Polignac number, because 22400055 - 2² = 22400051 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22400051) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 405 + ... + 6705.

It is an arithmetic number, because the mean of its divisors is an integer number (1638520).

Almost surely, 2^22400055 is an apocalyptic number.

22400055 is a deficient number, since it is larger than the sum of its proper divisors (16924425).

22400055 is a wasteful number, since it uses less digits than its factorization.

22400055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6391 (or 6388 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 18.

The square root of 22400055 is about 4732.8696369116. The cubic root of 22400055 is about 281.8921799975.

Adding to 22400055 its reverse (55000422), we get a palindrome (77400477).

The spelling of 22400055 in words is "twenty-two million, four hundred thousand, fifty-five".