22550004 has 18 divisors (see below), whose sum is σ = 57001490. Its totient is φ = 7516656.

The previous prime is 22549987. The next prime is 22550009. The reversal of 22550004 is 40005522.

It can be written as a sum of positive squares in only one way, i.e., 21344400 + 1205604 = 4620^2 + 1098^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22550009) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 313159 + ... + 313230.

Almost surely, 2^22550004 is an apocalyptic number.

It is an amenable number.

22550004 is an abundant number, since it is smaller than the sum of its proper divisors (34451486).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

22550004 is a wasteful number, since it uses less digits than its factorization.

22550004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 626399 (or 626394 counting only the distinct ones).

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

The square root of 22550004 is about 4748.6844494028. The cubic root of 22550004 is about 282.5197897745.

Adding to 22550004 its reverse (40005522), we get a palindrome (62555526).

The spelling of 22550004 in words is "twenty-two million, five hundred fifty thousand, four".