82521415 has 16 divisors (see below), whose sum is σ = 100310400. Its totient is φ = 65167360.

The previous prime is 82521403. The next prime is 82521457. The reversal of 82521415 is 51412528.

It is not a de Polignac number, because 82521415 - 2¹⁵ = 82488647 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 191250 + ... + 191680.

It is an arithmetic number, because the mean of its divisors is an integer number (6269400).

Almost surely, 2^82521415 is an apocalyptic number.

82521415 is a deficient number, since it is larger than the sum of its proper divisors (17788985).

82521415 is a wasteful number, since it uses less digits than its factorization.

82521415 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 842.

The product of its digits is 3200, while the sum is 28.

The square root of 82521415 is about 9084.1298427532. The cubic root of 82521415 is about 435.3670482849.

The spelling of 82521415 in words is "eighty-two million, five hundred twenty-one thousand, four hundred fifteen".