1213305363 has 24 divisors (see below), whose sum is σ = 1858908480. Its totient is φ = 760434480.

The previous prime is 1213305349. The next prime is 1213305377. The reversal of 1213305363 is 3635033121.

It is a happy number.

1213305363 is a `hidden beast` number, since 121 + 3 + 3 + 0 + 536 + 3 = 666.

It is an interprime number because it is at equal distance from previous prime (1213305349) and next prime (1213305377).

It is not a de Polignac number, because 1213305363 - 2¹⁶ = 1213239827 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1213304363) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4681 + ... + 49482.

It is an arithmetic number, because the mean of its divisors is an integer number (77454520).

Almost surely, 2^1213305363 is an apocalyptic number.

1213305363 is a deficient number, since it is larger than the sum of its proper divisors (645603117).

1213305363 is a wasteful number, since it uses less digits than its factorization.

1213305363 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54319 (or 54316 counting only the distinct ones).

The product of its (nonzero) digits is 4860, while the sum is 27.

The square root of 1213305363 is about 34832.5331120204. The cubic root of 1213305363 is about 1066.5716582153.

Adding to 1213305363 its reverse (3635033121), we get a palindrome (4848338484).

The spelling of 1213305363 in words is "one billion, two hundred thirteen million, three hundred five thousand, three hundred sixty-three".