1213083553 has 8 divisors (see below), whose sum is σ = 1333785600. Its totient is φ = 1094118480.

The previous prime is 1213083499. The next prime is 1213083577. The reversal of 1213083553 is 3553803121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1213083553 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1213083853) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 432778 + ... + 435571.

It is an arithmetic number, because the mean of its divisors is an integer number (166723200).

Almost surely, 2^1213083553 is an apocalyptic number.

It is an amenable number.

1213083553 is a deficient number, since it is larger than the sum of its proper divisors (120702047).

1213083553 is a wasteful number, since it uses less digits than its factorization.

1213083553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 868487.

The product of its (nonzero) digits is 10800, while the sum is 31.

The square root of 1213083553 is about 34829.3490177465. The cubic root of 1213083553 is about 1066.5066592781.

Adding to 1213083553 its reverse (3553803121), we get a palindrome (4766886674).

The spelling of 1213083553 in words is "one billion, two hundred thirteen million, eighty-three thousand, five hundred fifty-three".