1222355250 has 96 divisors (see below), whose sum is σ = 3499784496. Its totient is φ = 306777600.

The previous prime is 1222355243. The next prime is 1222355257. The reversal of 1222355250 is 525532221.

It is an interprime number because it is at equal distance from previous prime (1222355243) and next prime (1222355257).

It can be written as a sum of positive squares in 8 ways, for example, as 269583561 + 952771689 = 16419^2 + 30867^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1222355257) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 22272 + ... + 54228.

Almost surely, 2^1222355250 is an apocalyptic number.

1222355250 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 1222355250, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1749892248).

1222355250 is an abundant number, since it is smaller than the sum of its proper divisors (2277429246).

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

1222355250 is a wasteful number, since it uses less digits than its factorization.

1222355250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31997 (or 31984 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 27.

The square root of 1222355250 is about 34962.1974423805. The cubic root of 1222355250 is about 1069.2168986972.

Adding to 1222355250 its reverse (525532221), we get a palindrome (1747887471).

The spelling of 1222355250 in words is "one billion, two hundred twenty-two million, three hundred fifty-five thousand, two hundred fifty".