2161264327 has 2 divisors, whose sum is σ = 2161264328. Its totient is φ = 2161264326.

The previous prime is 2161264321. The next prime is 2161264351. The reversal of 2161264327 is 7234621612.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2161264327 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2161264292 and 2161264301.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2161264321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1080632163 + 1080632164.

It is an arithmetic number, because the mean of its divisors is an integer number (1080632164).

Almost surely, 2^2161264327 is an apocalyptic number.

2161264327 is a deficient number, since it is larger than the sum of its proper divisors (1).

2161264327 is an equidigital number, since it uses as much as digits as its factorization.

2161264327 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 24192, while the sum is 34.

The square root of 2161264327 is about 46489.4001574552. The cubic root of 2161264327 is about 1292.9129787092.

Adding to 2161264327 its reverse (7234621612), we get a palindrome (9395885939).

The spelling of 2161264327 in words is "two billion, one hundred sixty-one million, two hundred sixty-four thousand, three hundred twenty-seven".