1222533500 has 24 divisors (see below), whose sum is σ = 2670014256. Its totient is φ = 489013200.

The previous prime is 1222533491. The next prime is 1222533503. The reversal of 1222533500 is 53352221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1222533503) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1222034 + ... + 1223033.

It is an arithmetic number, because the mean of its divisors is an integer number (111250594).

Almost surely, 2^1222533500 is an apocalyptic number.

1222533500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1222533500 is an abundant number, since it is smaller than the sum of its proper divisors (1447480756).

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

1222533500 is a wasteful number, since it uses less digits than its factorization.

1222533500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2445086 (or 2445074 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 23.

The square root of 1222533500 is about 34964.7465313278. The cubic root of 1222533500 is about 1069.2688690358.

Adding to 1222533500 its reverse (53352221), we get a palindrome (1275885721).

The spelling of 1222533500 in words is "one billion, two hundred twenty-two million, five hundred thirty-three thousand, five hundred".