82515451 has 2 divisors, whose sum is σ = 82515452. Its totient is φ = 82515450.

The previous prime is 82515449. The next prime is 82515479. The reversal of 82515451 is 15451528.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 82515451 - 2¹ = 82515449 is a prime.

Together with 82515449, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (82515401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41257725 + 41257726.

It is an arithmetic number, because the mean of its divisors is an integer number (41257726).

Almost surely, 2^82515451 is an apocalyptic number.

82515451 is a deficient number, since it is larger than the sum of its proper divisors (1).

82515451 is an equidigital number, since it uses as much as digits as its factorization.

82515451 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8000, while the sum is 31.

The square root of 82515451 is about 9083.8015720292. The cubic root of 82515451 is about 435.3565597282.

Adding to 82515451 its reverse (15451528), we get a palindrome (97966979).

The spelling of 82515451 in words is "eighty-two million, five hundred fifteen thousand, four hundred fifty-one".