1131310023 has 4 divisors (see below), whose sum is σ = 1508413368. Its totient is φ = 754206680.

The previous prime is 1131310021. The next prime is 1131310057. The reversal of 1131310023 is 3200131311.

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 1131310023 - 2¹ = 1131310021 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1131309984 and 1131310011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1131310021) 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, 188551668 + ... + 188551673.

It is an arithmetic number, because the mean of its divisors is an integer number (377103342).

Almost surely, 2^1131310023 is an apocalyptic number.

1131310023 is a deficient number, since it is larger than the sum of its proper divisors (377103345).

1131310023 is an equidigital number, since it uses as much as digits as its factorization.

1131310023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 377103344.

The product of its (nonzero) digits is 54, while the sum is 15.

The square root of 1131310023 is about 33634.9524007393. The cubic root of 1131310023 is about 1041.9827875652.

Adding to 1131310023 its reverse (3200131311), we get a palindrome (4331441334).

The spelling of 1131310023 in words is "one billion, one hundred thirty-one million, three hundred ten thousand, twenty-three".