22355550 has 144 divisors (see below), whose sum is σ = 70566912. Its totient is φ = 4968000.

The previous prime is 22355519. The next prime is 22355551. The reversal of 22355550 is 5555322.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22355551) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 147975 + ... + 148125.

It is an arithmetic number, because the mean of its divisors is an integer number (490048).

Almost surely, 2^22355550 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22355550, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35283456).

22355550 is an abundant number, since it is smaller than the sum of its proper divisors (48211362).

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

22355550 is a wasteful number, since it uses less digits than its factorization.

22355550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 223 (or 215 counting only the distinct ones).

The product of its (nonzero) digits is 7500, while the sum is 27.

The square root of 22355550 is about 4728.1656062367. The cubic root of 22355550 is about 281.7053660321.

The spelling of 22355550 in words is "twenty-two million, three hundred fifty-five thousand, five hundred fifty".