1224522220 has 24 divisors (see below), whose sum is σ = 2572257744. Its totient is φ = 489663936.

The previous prime is 1224522209. The next prime is 1224522251. The reversal of 1224522220 is 222254221.

It is a junction number, because it is equal to n+sod(n) for n = 1224522191 and 1224522200.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 83047 + ... + 96673.

It is an arithmetic number, because the mean of its divisors is an integer number (107177406).

Almost surely, 2^1224522220 is an apocalyptic number.

1224522220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1224522220 is an abundant number, since it is smaller than the sum of its proper divisors (1347735524).

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

1224522220 is a wasteful number, since it uses less digits than its factorization.

1224522220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18129 (or 18127 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 22.

The square root of 1224522220 is about 34993.1739057777. The cubic root of 1224522220 is about 1069.8483553690.

Adding to 1224522220 its reverse (222254221), we get a palindrome (1446776441).

The spelling of 1224522220 in words is "one billion, two hundred twenty-four million, five hundred twenty-two thousand, two hundred twenty".