1224555000 has 80 divisors (see below), whose sum is σ = 3825556680. Its totient is φ = 326544000.

The previous prime is 1224554917. The next prime is 1224555001. The reversal of 1224555000 is 5554221.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1224555001) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 25819 + ... + 55818.

Almost surely, 2^1224555000 is an apocalyptic number.

1224555000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1224555000 is an abundant number, since it is smaller than the sum of its proper divisors (2601001680).

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

1224555000 is an equidigital number, since it uses as much as digits as its factorization.

1224555000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81666 (or 81647 counting only the distinct ones).

The product of its (nonzero) digits is 2000, while the sum is 24.

The square root of 1224555000 is about 34993.6422797056. The cubic root of 1224555000 is about 1069.8579017634.

The spelling of 1224555000 in words is "one billion, two hundred twenty-four million, five hundred fifty-five thousand".