1213445133 has 12 divisors (see below), whose sum is σ = 1753208028. Its totient is φ = 808753920.

The previous prime is 1213445111. The next prime is 1213445141. The reversal of 1213445133 is 3315443121.

It is a happy number.

1213445133 is a `hidden beast` number, since 1 + 213 + 445 + 1 + 3 + 3 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 967645449 + 245799684 = 31107^2 + 15678^2 .

It is not a de Polignac number, because 1213445133 - 2⁹ = 1213444621 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1213445097 and 1213445106.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1213445033) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 24541 + ... + 55037.

It is an arithmetic number, because the mean of its divisors is an integer number (146100669).

Almost surely, 2^1213445133 is an apocalyptic number.

It is an amenable number.

1213445133 is a deficient number, since it is larger than the sum of its proper divisors (539762895).

1213445133 is a wasteful number, since it uses less digits than its factorization.

1213445133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34924 (or 34921 counting only the distinct ones).

The product of its digits is 4320, while the sum is 27.

The square root of 1213445133 is about 34834.5393682764. The cubic root of 1213445133 is about 1066.6126121805.

Adding to 1213445133 its reverse (3315443121), we get a palindrome (4528888254).

The spelling of 1213445133 in words is "one billion, two hundred thirteen million, four hundred forty-five thousand, one hundred thirty-three".