1311322160 has 20 divisors (see below), whose sum is σ = 3048824208. Its totient is φ = 524528832.

The previous prime is 1311322153. The next prime is 1311322189. The reversal of 1311322160 is 612231131.

It is a tau number, because it is divible by the number of its divisors (20).

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8195684 + ... + 8195843.

Almost surely, 2^1311322160 is an apocalyptic number.

1311322160 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1311322160 is an abundant number, since it is smaller than the sum of its proper divisors (1737502048).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1311322160 is a wasteful number, since it uses less digits than its factorization.

1311322160 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16391540 (or 16391534 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 20.

The square root of 1311322160 is about 36212.1824804858. The cubic root of 1311322160 is about 1094.5521712172.

Adding to 1311322160 its reverse (612231131), we get a palindrome (1923553291).

The spelling of 1311322160 in words is "one billion, three hundred eleven million, three hundred twenty-two thousand, one hundred sixty".