1315115331 has 4 divisors (see below), whose sum is σ = 1753487112. Its totient is φ = 876743552.

The previous prime is 1315115299. The next prime is 1315115339. The reversal of 1315115331 is 1335115131.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1315115331 - 2⁵ = 1315115299 is a prime.

It is a super-2 number, since 2×1315115331² = 3459056667662479122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1315115339) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 219185886 + ... + 219185891.

It is an arithmetic number, because the mean of its divisors is an integer number (438371778).

Almost surely, 2^1315115331 is an apocalyptic number.

1315115331 is a deficient number, since it is larger than the sum of its proper divisors (438371781).

1315115331 is an equidigital number, since it uses as much as digits as its factorization.

1315115331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 438371780.

The product of its digits is 675, while the sum is 24.

The square root of 1315115331 is about 36264.5188993319. The cubic root of 1315115331 is about 1095.6065337200.

It can be divided in two parts, 13151 and 15331, that added together give a palindrome (28482).

The spelling of 1315115331 in words is "one billion, three hundred fifteen million, one hundred fifteen thousand, three hundred thirty-one".