1315161611 has 4 divisors (see below), whose sum is σ = 1316238192. Its totient is φ = 1314085032.

The previous prime is 1315161593. The next prime is 1315161619. The reversal of 1315161611 is 1161615131.

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 1315161611 - 2²⁶ = 1248052747 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1315161619) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 536456 + ... + 538901.

It is an arithmetic number, because the mean of its divisors is an integer number (329059548).

Almost surely, 2^1315161611 is an apocalyptic number.

1315161611 is a deficient number, since it is larger than the sum of its proper divisors (1076581).

1315161611 is a wasteful number, since it uses less digits than its factorization.

1315161611 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1076580.

The product of its digits is 540, while the sum is 26.

The square root of 1315161611 is about 36265.1569829775. The cubic root of 1315161611 is about 1095.6193853369.

Adding to 1315161611 its reverse (1161615131), we get a palindrome (2476776742).

The spelling of 1315161611 in words is "one billion, three hundred fifteen million, one hundred sixty-one thousand, six hundred eleven".