1313131023 has 6 divisors (see below), whose sum is σ = 1896744824. Its totient is φ = 875420676.

The previous prime is 1313131003. The next prime is 1313131063. The reversal of 1313131023 is 3201313131.

It is a happy number.

It is not a de Polignac number, because 1313131023 - 2¹⁷ = 1312999951 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1313130987 and 1313131005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1313131003) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 72951715 + ... + 72951732.

Almost surely, 2^1313131023 is an apocalyptic number.

1313131023 is a deficient number, since it is larger than the sum of its proper divisors (583613801).

1313131023 is a wasteful number, since it uses less digits than its factorization.

1313131023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145903453 (or 145903450 counting only the distinct ones).

The product of its (nonzero) digits is 162, while the sum is 18.

The square root of 1313131023 is about 36237.1497637438. The cubic root of 1313131023 is about 1095.0552220852.

Adding to 1313131023 its reverse (3201313131), we get a palindrome (4514444154).

The spelling of 1313131023 in words is "one billion, three hundred thirteen million, one hundred thirty-one thousand, twenty-three".