82520351 has 4 divisors (see below), whose sum is σ = 82605792. Its totient is φ = 82434912.

The previous prime is 82520327. The next prime is 82520359. The reversal of 82520351 is 15302528.

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

It is a cyclic number.

It is not a de Polignac number, because 82520351 - 2¹⁸ = 82258207 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 82520351.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82520359) 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, 41255 + ... + 43208.

It is an arithmetic number, because the mean of its divisors is an integer number (20651448).

Almost surely, 2^82520351 is an apocalyptic number.

82520351 is a deficient number, since it is larger than the sum of its proper divisors (85441).

82520351 is an equidigital number, since it uses as much as digits as its factorization.

82520351 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85440.

The product of its (nonzero) digits is 2400, while the sum is 26.

The square root of 82520351 is about 9084.0712788925. The cubic root of 82520351 is about 435.3651771241.

Adding to 82520351 its reverse (15302528), we get a palindrome (97822879).

The spelling of 82520351 in words is "eighty-two million, five hundred twenty thousand, three hundred fifty-one".