82015961 has 2 divisors, whose sum is σ = 82015962. Its totient is φ = 82015960.

The previous prime is 82015943. The next prime is 82015981. The reversal of 82015961 is 16951028.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 75151561 + 6864400 = 8669^2 + 2620^2 .

It is a cyclic number.

It is not a de Polignac number, because 82015961 - 2⁶ = 82015897 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (82015931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41007980 + 41007981.

It is an arithmetic number, because the mean of its divisors is an integer number (41007981).

Almost surely, 2^82015961 is an apocalyptic number.

It is an amenable number.

82015961 is a deficient number, since it is larger than the sum of its proper divisors (1).

82015961 is an equidigital number, since it uses as much as digits as its factorization.

82015961 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4320, while the sum is 32.

The square root of 82015961 is about 9056.2663940500. The cubic root of 82015961 is about 434.4763346624.

Adding to 82015961 its reverse (16951028), we get a palindrome (98966989).

The spelling of 82015961 in words is "eighty-two million, fifteen thousand, nine hundred sixty-one".