1313240133 has 16 divisors (see below), whose sum is σ = 1778765760. Its totient is φ = 861628416.

The previous prime is 1313240111. The next prime is 1313240161. The reversal of 1313240133 is 3310423131.

It is not a de Polignac number, because 1313240133 - 2⁹ = 1313239621 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1313240333) 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, 280891 + ... + 285527.

It is an arithmetic number, because the mean of its divisors is an integer number (111172860).

Almost surely, 2^1313240133 is an apocalyptic number.

It is an amenable number.

1313240133 is a deficient number, since it is larger than the sum of its proper divisors (465525627).

1313240133 is a wasteful number, since it uses less digits than its factorization.

1313240133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6116.

The product of its (nonzero) digits is 648, while the sum is 21.

The square root of 1313240133 is about 36238.6552316722. The cubic root of 1313240133 is about 1095.0855511649.

Adding to 1313240133 its reverse (3310423131), we get a palindrome (4623663264).

The spelling of 1313240133 in words is "one billion, three hundred thirteen million, two hundred forty thousand, one hundred thirty-three".