1331612163 has 32 divisors (see below), whose sum is σ = 2352614400. Its totient is φ = 727835328.

The previous prime is 1331612147. The next prime is 1331612197. The reversal of 1331612163 is 3612161331.

1331612163 is a `hidden beast` number, since 1 + 3 + 31 + 612 + 16 + 3 = 666.

It is not a de Polignac number, because 1331612163 - 2⁴ = 1331612147 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (1331612563) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 148818 + ... + 157511.

It is an arithmetic number, because the mean of its divisors is an integer number (73519200).

Almost surely, 2^1331612163 is an apocalyptic number.

1331612163 is a deficient number, since it is larger than the sum of its proper divisors (1021002237).

1331612163 is a wasteful number, since it uses less digits than its factorization.

1331612163 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 306368 (or 306362 counting only the distinct ones).

The product of its digits is 1944, while the sum is 27.

The square root of 1331612163 is about 36491.2614607936. The cubic root of 1331612163 is about 1100.1686140975.

Adding to 1331612163 its reverse (3612161331), we get a palindrome (4943773494).

The spelling of 1331612163 in words is "one billion, three hundred thirty-one million, six hundred twelve thousand, one hundred sixty-three".