1213835513 has 16 divisors (see below), whose sum is σ = 1450431360. Its totient is φ = 1002758400.

The previous prime is 1213835507. The next prime is 1213835537. The reversal of 1213835513 is 3155383121.

It is a cyclic number.

It is not a de Polignac number, because 1213835513 - 2⁸ = 1213835257 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1213835513.

It is not an unprimeable number, because it can be changed into a prime (1213835563) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 106493 + ... + 117338.

It is an arithmetic number, because the mean of its divisors is an integer number (90651960).

Almost surely, 2^1213835513 is an apocalyptic number.

It is an amenable number.

1213835513 is a deficient number, since it is larger than the sum of its proper divisors (236595847).

1213835513 is a wasteful number, since it uses less digits than its factorization.

1213835513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 223888.

The product of its digits is 10800, while the sum is 32.

The square root of 1213835513 is about 34840.1422643479. The cubic root of 1213835513 is about 1066.7269806499.

The spelling of 1213835513 in words is "one billion, two hundred thirteen million, eight hundred thirty-five thousand, five hundred thirteen".