22251750 has 32 divisors (see below), whose sum is σ = 55542240. Its totient is φ = 5933600.

The previous prime is 22251743. The next prime is 22251751. The reversal of 22251750 is 5715222.

It is a self number, because there is not a number n which added to its sum of digits gives 22251750.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22251751) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14085 + ... + 15584.

It is an arithmetic number, because the mean of its divisors is an integer number (1735695).

Almost surely, 2^22251750 is an apocalyptic number.

22251750 is an abundant number, since it is smaller than the sum of its proper divisors (33290490).

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

22251750 is a wasteful number, since it uses less digits than its factorization.

22251750 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29689 (or 29679 counting only the distinct ones).

The product of its (nonzero) digits is 1400, while the sum is 24.

The square root of 22251750 is about 4717.1760620100. The cubic root of 22251750 is about 281.2686901160.

Adding to 22251750 its reverse (5715222), we get a palindrome (27966972).

The spelling of 22251750 in words is "twenty-two million, two hundred fifty-one thousand, seven hundred fifty".