1224215500 has 24 divisors (see below), whose sum is σ = 2673687744. Its totient is φ = 489686000.

The previous prime is 1224215497. The next prime is 1224215501. The reversal of 1224215500 is 55124221.

It is not an unprimeable number, because it can be changed into a prime (1224215501) 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, 1223716 + ... + 1224715.

It is an arithmetic number, because the mean of its divisors is an integer number (111403656).

Almost surely, 2^1224215500 is an apocalyptic number.

1224215500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1224215500 is an abundant number, since it is smaller than the sum of its proper divisors (1449472244).

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

1224215500 is a wasteful number, since it uses less digits than its factorization.

1224215500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2448450 (or 2448438 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 22.

The square root of 1224215500 is about 34988.7910622816. The cubic root of 1224215500 is about 1069.7590222169.

Adding to 1224215500 its reverse (55124221), we get a palindrome (1279339721).

The spelling of 1224215500 in words is "one billion, two hundred twenty-four million, two hundred fifteen thousand, five hundred".