82351261 has 2 divisors, whose sum is σ = 82351262. Its totient is φ = 82351260.

The previous prime is 82351253. The next prime is 82351273. The reversal of 82351261 is 16215328.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 81108036 + 1243225 = 9006^2 + 1115^2 .

It is a cyclic number.

It is not a de Polignac number, because 82351261 - 2³ = 82351253 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (82351231) 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, 41175630 + 41175631.

It is an arithmetic number, because the mean of its divisors is an integer number (41175631).

Almost surely, 2^82351261 is an apocalyptic number.

It is an amenable number.

82351261 is a deficient number, since it is larger than the sum of its proper divisors (1).

82351261 is an equidigital number, since it uses as much as digits as its factorization.

82351261 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2880, while the sum is 28.

The square root of 82351261 is about 9074.7595560433. The cubic root of 82351261 is about 435.0676091682.

Adding to 82351261 its reverse (16215328), we get a palindrome (98566589).

The spelling of 82351261 in words is "eighty-two million, three hundred fifty-one thousand, two hundred sixty-one".