82515469 has 4 divisors (see below), whose sum is σ = 85360860. Its totient is φ = 79670080.

The previous prime is 82515451. The next prime is 82515479. The reversal of 82515469 is 96451528.

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

It can be written as a sum of positive squares in 2 ways, for example, as 66015625 + 16499844 = 8125^2 + 4062^2 .

It is a cyclic number.

It is not a de Polignac number, because 82515469 - 2⁵ = 82515437 is a prime.

It is a super-2 number, since 2×82515469² = 13617605248579922, which contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82515449) 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 in 3 ways as a sum of consecutive naturals, for example, 1422652 + ... + 1422709.

It is an arithmetic number, because the mean of its divisors is an integer number (21340215).

Almost surely, 2^82515469 is an apocalyptic number.

It is an amenable number.

82515469 is a deficient number, since it is larger than the sum of its proper divisors (2845391).

82515469 is a wasteful number, since it uses less digits than its factorization.

82515469 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2845390.

The product of its digits is 86400, while the sum is 40.

The square root of 82515469 is about 9083.8025628038. The cubic root of 82515469 is about 435.3565913846.

The spelling of 82515469 in words is "eighty-two million, five hundred fifteen thousand, four hundred sixty-nine".