1313133243 has 4 divisors (see below), whose sum is σ = 1750844328. Its totient is φ = 875422160.

The previous prime is 1313133229. The next prime is 1313133251. The reversal of 1313133243 is 3423313131.

It is a happy number.

1313133243 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

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 1313133243 - 2⁶ = 1313133179 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1313133203) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 218855538 + ... + 218855543.

It is an arithmetic number, because the mean of its divisors is an integer number (437711082).

Almost surely, 2^1313133243 is an apocalyptic number.

1313133243 is a deficient number, since it is larger than the sum of its proper divisors (437711085).

1313133243 is an equidigital number, since it uses as much as digits as its factorization.

1313133243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 437711084.

The product of its digits is 1944, while the sum is 24.

The square root of 1313133243 is about 36237.1803952791. The cubic root of 1313133243 is about 1095.0558391908.

Adding to 1313133243 its reverse (3423313131), we get a palindrome (4736446374).

The spelling of 1313133243 in words is "one billion, three hundred thirteen million, one hundred thirty-three thousand, two hundred forty-three".