1161815313 has 8 divisors (see below), whose sum is σ = 1602504000. Its totient is φ = 747835088.

The previous prime is 1161815311. The next prime is 1161815321. The reversal of 1161815313 is 3135181611.

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

It is a cyclic number.

It is not a de Polignac number, because 1161815313 - 2¹ = 1161815311 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1161815311) 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, 6677013 + ... + 6677186.

It is an arithmetic number, because the mean of its divisors is an integer number (200313000).

Almost surely, 2^1161815313 is an apocalyptic number.

It is an amenable number.

1161815313 is a deficient number, since it is larger than the sum of its proper divisors (440688687).

1161815313 is a wasteful number, since it uses less digits than its factorization.

1161815313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13354231.

The product of its digits is 2160, while the sum is 30.

The square root of 1161815313 is about 34085.4120262613. The cubic root of 1161815313 is about 1051.2653869029.

Adding to 1161815313 its reverse (3135181611), we get a palindrome (4296996924).

The spelling of 1161815313 in words is "one billion, one hundred sixty-one million, eight hundred fifteen thousand, three hundred thirteen".