1213534303 has 4 divisors (see below), whose sum is σ = 1266296688. Its totient is φ = 1160771920.

The previous prime is 1213534271. The next prime is 1213534321. The reversal of 1213534303 is 3034353121.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1213534303 - 2⁵ = 1213534271 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1213534363) 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 3 ways as a sum of consecutive naturals, for example, 26381158 + ... + 26381203.

It is an arithmetic number, because the mean of its divisors is an integer number (316574172).

Almost surely, 2^1213534303 is an apocalyptic number.

1213534303 is a deficient number, since it is larger than the sum of its proper divisors (52762385).

1213534303 is an equidigital number, since it uses as much as digits as its factorization.

1213534303 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52762384.

The product of its (nonzero) digits is 3240, while the sum is 25.

The square root of 1213534303 is about 34835.8192526026. The cubic root of 1213534303 is about 1066.6387382119.

Adding to 1213534303 its reverse (3034353121), we get a palindrome (4247887424).

The spelling of 1213534303 in words is "one billion, two hundred thirteen million, five hundred thirty-four thousand, three hundred three".