1213353236 has 12 divisors (see below), whose sum is σ = 2124445428. Its totient is φ = 606368832.

The previous prime is 1213353233. The next prime is 1213353289. The reversal of 1213353236 is 6323533121.

It can be written as a sum of positive squares in 2 ways, for example, as 628003600 + 585349636 = 25060^2 + 24194^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1213353199 and 1213353208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1213353233) 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 3 ways as a sum of consecutive naturals, for example, 67961 + ... + 83936.

It is an arithmetic number, because the mean of its divisors is an integer number (177037119).

Almost surely, 2^1213353236 is an apocalyptic number.

It is an amenable number.

1213353236 is a deficient number, since it is larger than the sum of its proper divisors (911092192).

1213353236 is a wasteful number, since it uses less digits than its factorization.

1213353236 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 153898 (or 153896 counting only the distinct ones).

The product of its digits is 9720, while the sum is 29.

The square root of 1213353236 is about 34833.2202932775. The cubic root of 1213353236 is about 1066.5856858226.

Adding to 1213353236 its reverse (6323533121), we get a palindrome (7536886357).

The spelling of 1213353236 in words is "one billion, two hundred thirteen million, three hundred fifty-three thousand, two hundred thirty-six".