2161311063 has 8 divisors (see below), whose sum is σ = 2881972608. Its totient is φ = 1440761784.

The previous prime is 2161311049. The next prime is 2161311137. The reversal of 2161311063 is 3601131612.

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

It is not a de Polignac number, because 2161311063 - 2⁹ = 2161310551 is a prime.

It is a super-2 number, since 2×2161311063² = 9342531022092379938, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2161311263) 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, 41470 + ... + 77732.

It is an arithmetic number, because the mean of its divisors is an integer number (360246576).

Almost surely, 2^2161311063 is an apocalyptic number.

2161311063 is a deficient number, since it is larger than the sum of its proper divisors (720661545).

2161311063 is a wasteful number, since it uses less digits than its factorization.

2161311063 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56133.

The product of its (nonzero) digits is 648, while the sum is 24.

The square root of 2161311063 is about 46489.9028069537. The cubic root of 2161311063 is about 1292.9222981224.

Adding to 2161311063 its reverse (3601131612), we get a palindrome (5762442675).

The spelling of 2161311063 in words is "two billion, one hundred sixty-one million, three hundred eleven thousand, sixty-three".