82251161 has 4 divisors (see below), whose sum is σ = 82303524. Its totient is φ = 82198800.

The previous prime is 82251139. The next prime is 82251167. The reversal of 82251161 is 16115228.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 38440000 + 43811161 = 6200^2 + 6619^2 .

It is a cyclic number.

It is not a de Polignac number, because 82251161 - 2¹⁰ = 82250137 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 82251161.

It is not an unprimeable number, because it can be changed into a prime (82251167) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23750 + ... + 26991.

It is an arithmetic number, because the mean of its divisors is an integer number (20575881).

Almost surely, 2^82251161 is an apocalyptic number.

It is an amenable number.

82251161 is a deficient number, since it is larger than the sum of its proper divisors (52363).

82251161 is a wasteful number, since it uses less digits than its factorization.

82251161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52362.

The product of its digits is 960, while the sum is 26.

The square root of 82251161 is about 9069.2425813846. The cubic root of 82251161 is about 434.8912592068.

Adding to 82251161 its reverse (16115228), we get a palindrome (98366389).

The spelling of 82251161 in words is "eighty-two million, two hundred fifty-one thousand, one hundred sixty-one".