20150222250 has 128 divisors (see below), whose sum is σ = 52571151360. Its totient is φ = 5134080000.

The previous prime is 20150222249. The next prime is 20150222297. The reversal of 20150222250 is 5222205102.

It is a Curzon number.

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, 2104975 + ... + 2114525.

It is an arithmetic number, because the mean of its divisors is an integer number (410712120).

Almost surely, 2^20150222250 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20150222250, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26285575680).

20150222250 is an abundant number, since it is smaller than the sum of its proper divisors (32420929110).

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

20150222250 is a wasteful number, since it uses less digits than its factorization.

20150222250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9697 (or 9687 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 21.

Adding to 20150222250 its reverse (5222205102), we get a palindrome (25372427352).

The spelling of 20150222250 in words is "twenty billion, one hundred fifty million, two hundred twenty-two thousand, two hundred fifty".