31282050161 has 2 divisors, whose sum is σ = 31282050162. Its totient is φ = 31282050160.

The previous prime is 31282050119. The next prime is 31282050199. The reversal of 31282050161 is 16105028213.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 30967200625 + 314849536 = 175975^2 + 17744^2 .

It is an emirp because it is prime and its reverse (16105028213) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 31282050161 - 2²² = 31277855857 is a prime.

It is not a weakly prime, because it can be changed into another prime (31282050061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15641025080 + 15641025081.

It is an arithmetic number, because the mean of its divisors is an integer number (15641025081).

Almost surely, 2^31282050161 is an apocalyptic number.

It is an amenable number.

31282050161 is a deficient number, since it is larger than the sum of its proper divisors (1).

31282050161 is an equidigital number, since it uses as much as digits as its factorization.

31282050161 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2880, while the sum is 29.

Adding to 31282050161 its reverse (16105028213), we get a palindrome (47387078374).

The spelling of 31282050161 in words is "thirty-one billion, two hundred eighty-two million, fifty thousand, one hundred sixty-one".