3116331521 has 8 divisors (see below), whose sum is σ = 3135977640. Its totient is φ = 3096704512.

The previous prime is 3116331511. The next prime is 3116331539. The reversal of 3116331521 is 1251336113.

It can be written as a sum of positive squares in 4 ways, for example, as 1513210000 + 1603121521 = 38900^2 + 40039^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3116331521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3116331511) 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, 462545 + ... + 469233.

It is an arithmetic number, because the mean of its divisors is an integer number (391997205).

Almost surely, 2^3116331521 is an apocalyptic number.

It is an amenable number.

3116331521 is a deficient number, since it is larger than the sum of its proper divisors (19646119).

3116331521 is a wasteful number, since it uses less digits than its factorization.

3116331521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9555.

The product of its digits is 1620, while the sum is 26.

The square root of 3116331521 is about 55824.1123619534. The cubic root of 3116331521 is about 1460.6557886190.

Adding to 3116331521 its reverse (1251336113), we get a palindrome (4367667634).

The spelling of 3116331521 in words is "three billion, one hundred sixteen million, three hundred thirty-one thousand, five hundred twenty-one".