82251311 has 2 divisors, whose sum is σ = 82251312. Its totient is φ = 82251310.

The previous prime is 82251271. The next prime is 82251313. The reversal of 82251311 is 11315228.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 82251311 - 2²⁶ = 15142447 is a prime.

It is a super-2 number, since 2×82251311² = 13530556322437442, which contains 22 as substring.

Together with 82251313, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (82251313) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41125655 + 41125656.

It is an arithmetic number, because the mean of its divisors is an integer number (41125656).

Almost surely, 2^82251311 is an apocalyptic number.

82251311 is a deficient number, since it is larger than the sum of its proper divisors (1).

82251311 is an equidigital number, since it uses as much as digits as its factorization.

82251311 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 480, while the sum is 23.

The square root of 82251311 is about 9069.2508510902. The cubic root of 82251311 is about 434.8915235745.

Adding to 82251311 its reverse (11315228), we get a palindrome (93566539).

The spelling of 82251311 in words is "eighty-two million, two hundred fifty-one thousand, three hundred eleven".