1185511313 has 16 divisors (see below), whose sum is σ = 1376755200. Its totient is φ = 999806976.

The previous prime is 1185511309. The next prime is 1185511321. The reversal of 1185511313 is 3131155811.

It is not a de Polignac number, because 1185511313 - 2² = 1185511309 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1185511513) 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, 226856 + ... + 232022.

It is an arithmetic number, because the mean of its divisors is an integer number (86047200).

Almost surely, 2^1185511313 is an apocalyptic number.

It is an amenable number.

1185511313 is a deficient number, since it is larger than the sum of its proper divisors (191243887).

1185511313 is an equidigital number, since it uses as much as digits as its factorization.

1185511313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5696.

The product of its digits is 1800, while the sum is 29.

The square root of 1185511313 is about 34431.2548856413. The cubic root of 1185511313 is about 1058.3644270086.

The spelling of 1185511313 in words is "one billion, one hundred eighty-five million, five hundred eleven thousand, three hundred thirteen".