82319261 has 2 divisors, whose sum is σ = 82319262. Its totient is φ = 82319260.

The previous prime is 82319249. The next prime is 82319333. The reversal of 82319261 is 16291328.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 49084036 + 33235225 = 7006^2 + 5765^2 .

It is a cyclic number.

It is not a de Polignac number, because 82319261 - 2¹⁸ = 82057117 is a prime.

It is a super-2 number, since 2×82319261² = 13552921463172242, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (82319161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41159630 + 41159631.

It is an arithmetic number, because the mean of its divisors is an integer number (41159631).

Almost surely, 2^82319261 is an apocalyptic number.

It is an amenable number.

82319261 is a deficient number, since it is larger than the sum of its proper divisors (1).

82319261 is an equidigital number, since it uses as much as digits as its factorization.

82319261 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5184, while the sum is 32.

The square root of 82319261 is about 9072.9962526169. The cubic root of 82319261 is about 435.0112491036.

The spelling of 82319261 in words is "eighty-two million, three hundred nineteen thousand, two hundred sixty-one".