1131580811 has 8 divisors (see below), whose sum is σ = 1153963104. Its totient is φ = 1109384640.

The previous prime is 1131580759. The next prime is 1131580823. The reversal of 1131580811 is 1180851311.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1131580811 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1131580831) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34220 + ... + 58601.

It is an arithmetic number, because the mean of its divisors is an integer number (144245388).

Almost surely, 2^1131580811 is an apocalyptic number.

1131580811 is a deficient number, since it is larger than the sum of its proper divisors (22382293).

1131580811 is an equidigital number, since it uses as much as digits as its factorization.

1131580811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93061.

The product of its (nonzero) digits is 960, while the sum is 29.

The square root of 1131580811 is about 33638.9775558057. The cubic root of 1131580811 is about 1042.0659165397.

The spelling of 1131580811 in words is "one billion, one hundred thirty-one million, five hundred eighty thousand, eight hundred eleven".