1161815315 has 8 divisors (see below), whose sum is σ = 1417808880. Its totient is φ = 913698592.

The previous prime is 1161815311. The next prime is 1161815321. The reversal of 1161815315 is 5135181611.

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 1161815315 - 2² = 1161815311 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1161815311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1968884 + ... + 1969473.

It is an arithmetic number, because the mean of its divisors is an integer number (177226110).

Almost surely, 2^1161815315 is an apocalyptic number.

1161815315 is a deficient number, since it is larger than the sum of its proper divisors (255993565).

1161815315 is an equidigital number, since it uses as much as digits as its factorization.

1161815315 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3938421.

The product of its digits is 3600, while the sum is 32.

The square root of 1161815315 is about 34085.4120555994. The cubic root of 1161815315 is about 1051.2653875061.

Adding to 1161815315 its reverse (5135181611), we get a palindrome (6296996926).

The spelling of 1161815315 in words is "one billion, one hundred sixty-one million, eight hundred fifteen thousand, three hundred fifteen".