20161616131 has 2 divisors, whose sum is σ = 20161616132. Its totient is φ = 20161616130.

The previous prime is 20161616107. The next prime is 20161616159. The reversal of 20161616131 is 13161616102.

It is an a-pointer prime, because the next prime (20161616159) can be obtained adding 20161616131 to its sum of digits (28).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20161616131 - 2⁷ = 20161616003 is a prime.

It is a super-2 number, since 2×20161616131² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20161616131.

It is not a weakly prime, because it can be changed into another prime (20161611131) 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 as a sum of consecutive naturals, namely, 10080808065 + 10080808066.

It is an arithmetic number, because the mean of its divisors is an integer number (10080808066).

Almost surely, 2^20161616131 is an apocalyptic number.

20161616131 is a deficient number, since it is larger than the sum of its proper divisors (1).

20161616131 is an equidigital number, since it uses as much as digits as its factorization.

20161616131 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1296, while the sum is 28.

The spelling of 20161616131 in words is "twenty billion, one hundred sixty-one million, six hundred sixteen thousand, one hundred thirty-one".