1222220450 has 24 divisors (see below), whose sum is σ = 2479997520. Its totient is φ = 444443600.

The previous prime is 1222220449. The next prime is 1222220473. The reversal of 1222220450 is 540222221.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1110560 + ... + 1111659.

It is an arithmetic number, because the mean of its divisors is an integer number (103333230).

Almost surely, 2^1222220450 is an apocalyptic number.

1222220450 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1222220450 is an abundant number, since it is smaller than the sum of its proper divisors (1257777070).

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

1222220450 is a wasteful number, since it uses less digits than its factorization.

1222220450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2222242 (or 2222237 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 20.

The square root of 1222220450 is about 34960.2695927820. The cubic root of 1222220450 is about 1069.1775932289.

Adding to 1222220450 its reverse (540222221), we get a palindrome (1762442671).

The spelling of 1222220450 in words is "one billion, two hundred twenty-two million, two hundred twenty thousand, four hundred fifty".