1213340555 has 16 divisors (see below), whose sum is σ = 1665183744. Its totient is φ = 831418080.

The previous prime is 1213340549. The next prime is 1213340561. The reversal of 1213340555 is 5550433121.

It is an interprime number because it is at equal distance from previous prime (1213340549) and next prime (1213340561).

It is not a de Polignac number, because 1213340555 - 2⁸ = 1213340299 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 41414 + ... + 64356.

It is an arithmetic number, because the mean of its divisors is an integer number (104073984).

Almost surely, 2^1213340555 is an apocalyptic number.

1213340555 is a deficient number, since it is larger than the sum of its proper divisors (451843189).

1213340555 is a wasteful number, since it uses less digits than its factorization.

1213340555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24466.

The product of its (nonzero) digits is 9000, while the sum is 29.

The square root of 1213340555 is about 34833.0382682878. The cubic root of 1213340555 is about 1066.5819701088.

Adding to 1213340555 its reverse (5550433121), we get a palindrome (6763773676).

The spelling of 1213340555 in words is "one billion, two hundred thirteen million, three hundred forty thousand, five hundred fifty-five".