22251665250 has 128 divisors (see below), whose sum is σ = 61927407360. Its totient is φ = 5913000000.

The previous prime is 22251665231. The next prime is 22251665281. The reversal of 22251665250 is 5256615222.

22251665250 is a `hidden beast` number, since 2 + 22 + 51 + 66 + 525 + 0 = 666.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1972125 + ... + 1983375.

It is an arithmetic number, because the mean of its divisors is an integer number (483807870).

Almost surely, 2^22251665250 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22251665250, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30963703680).

22251665250 is an abundant number, since it is smaller than the sum of its proper divisors (39675742110).

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

22251665250 is a wasteful number, since it uses less digits than its factorization.

22251665250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11570 (or 11554 counting only the distinct ones).

The product of its (nonzero) digits is 72000, while the sum is 36.

The spelling of 22251665250 in words is "twenty-two billion, two hundred fifty-one million, six hundred sixty-five thousand, two hundred fifty".