1163131513 has 4 divisors (see below), whose sum is σ = 1187879040. Its totient is φ = 1138383988.

The previous prime is 1163131499. The next prime is 1163131549. The reversal of 1163131513 is 3151313611.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1163131513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1163135513) 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, 12373693 + ... + 12373786.

It is an arithmetic number, because the mean of its divisors is an integer number (296969760).

Almost surely, 2^1163131513 is an apocalyptic number.

It is an amenable number.

1163131513 is a deficient number, since it is larger than the sum of its proper divisors (24747527).

1163131513 is an equidigital number, since it uses as much as digits as its factorization.

1163131513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24747526.

The product of its digits is 810, while the sum is 25.

The square root of 1163131513 is about 34104.7139410375. The cubic root of 1163131513 is about 1051.6622237327.

The spelling of 1163131513 in words is "one billion, one hundred sixty-three million, one hundred thirty-one thousand, five hundred thirteen".