1224055616 has 56 divisors (see below), whose sum is σ = 2797308096. Its totient is φ = 520565760.

The previous prime is 1224055603. The next prime is 1224055621. The reversal of 1224055616 is 6165504221.

It is a tau number, because it is divible by the number of its divisors (56).

It is a super-2 number, since 2×1224055616² = 2996624302122278912, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a congruent number.

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, 48260 + ... + 69116.

Almost surely, 2^1224055616 is an apocalyptic number.

1224055616 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1224055616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1398654048).

1224055616 is an abundant number, since it is smaller than the sum of its proper divisors (1573252480).

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

1224055616 is a wasteful number, since it uses less digits than its factorization.

1224055616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21007 (or 20997 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 32.

The square root of 1224055616 is about 34986.5061988190. The cubic root of 1224055616 is about 1069.7124495892.

Adding to 1224055616 its reverse (6165504221), we get a palindrome (7389559837).

The spelling of 1224055616 in words is "one billion, two hundred twenty-four million, fifty-five thousand, six hundred sixteen".