1222220250 has 96 divisors (see below), whose sum is σ = 3385746000. Its totient is φ = 317952000.

The previous prime is 1222220249. The next prime is 1222220323. The reversal of 1222220250 is 520222221.

It can be written as a sum of positive squares in 8 ways, for example, as 62204769 + 1160015481 = 7887^2 + 34059^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 85626 + ... + 98874.

Almost surely, 2^1222220250 is an apocalyptic number.

1222220250 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1222220250, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1692873000).

1222220250 is an abundant number, since it is smaller than the sum of its proper divisors (2163525750).

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

1222220250 is a wasteful number, since it uses less digits than its factorization.

1222220250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13313 (or 13300 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 18.

The square root of 1222220250 is about 34960.2667323921. The cubic root of 1222220250 is about 1069.1775349101.

Adding to 1222220250 its reverse (520222221), we get a palindrome (1742442471).

The spelling of 1222220250 in words is "one billion, two hundred twenty-two million, two hundred twenty thousand, two hundred fifty".