1213424555 has 32 divisors (see below), whose sum is σ = 1764498816. Its totient is φ = 782014464.

The previous prime is 1213424533. The next prime is 1213424557. The reversal of 1213424555 is 5554243121.

It is not a de Polignac number, because 1213424555 - 2¹⁰ = 1213423531 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1213424557) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 759017 + ... + 760613.

It is an arithmetic number, because the mean of its divisors is an integer number (55140588).

Almost surely, 2^1213424555 is an apocalyptic number.

1213424555 is a deficient number, since it is larger than the sum of its proper divisors (551074261).

1213424555 is a wasteful number, since it uses less digits than its factorization.

1213424555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2903.

The product of its digits is 24000, while the sum is 32.

The square root of 1213424555 is about 34834.2439992603. The cubic root of 1213424555 is about 1066.6065828244.

Adding to 1213424555 its reverse (5554243121), we get a palindrome (6767667676).

The spelling of 1213424555 in words is "one billion, two hundred thirteen million, four hundred twenty-four thousand, five hundred fifty-five".