22551550 has 24 divisors (see below), whose sum is σ = 47938896. Its totient is φ = 7731840.

The previous prime is 22551533. The next prime is 22551559. The reversal of 22551550 is 5515522.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22551559) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 31867 + ... + 32566.

It is an arithmetic number, because the mean of its divisors is an integer number (1997454).

Almost surely, 2^22551550 is an apocalyptic number.

22551550 is an abundant number, since it is smaller than the sum of its proper divisors (25387346).

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

22551550 is a wasteful number, since it uses less digits than its factorization.

22551550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64452 (or 64447 counting only the distinct ones).

The product of its (nonzero) digits is 2500, while the sum is 25.

The square root of 22551550 is about 4748.8472285387. The cubic root of 22551550 is about 282.5262460278.

It can be divided in two parts, 2 and 2551550, that added together give a palindrome (2551552).

The spelling of 22551550 in words is "twenty-two million, five hundred fifty-one thousand, five hundred fifty".