1222163550 has 72 divisors (see below), whose sum is σ = 3289737360. Its totient is φ = 325296000.

The previous prime is 1222163533. The next prime is 1222163557. The reversal of 1222163550 is 553612221.

It is a happy number.

1222163550 is a `hidden beast` number, since 1 + 2 + 2 + 21 + 635 + 5 + 0 = 666.

1222163550 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1222163557) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 268191 + ... + 272709.

Almost surely, 2^1222163550 is an apocalyptic number.

1222163550 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 1222163550, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1644868680).

1222163550 is an abundant number, since it is smaller than the sum of its proper divisors (2067573810).

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

1222163550 is a wasteful number, since it uses less digits than its factorization.

1222163550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5138 (or 5130 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

The square root of 1222163550 is about 34959.4558024006. The cubic root of 1222163550 is about 1069.1610012551.

Adding to 1222163550 its reverse (553612221), we get a palindrome (1775775771).

The spelling of 1222163550 in words is "one billion, two hundred twenty-two million, one hundred sixty-three thousand, five hundred fifty".