82521325 has 6 divisors (see below), whose sum is σ = 102326474. Its totient is φ = 66017040.

The previous prime is 82521319. The next prime is 82521337. The reversal of 82521325 is 52312528.

It can be written as a sum of positive squares in 3 ways, for example, as 1898884 + 80622441 = 1378^2 + 8979^2 .

It is not a de Polignac number, because 82521325 - 2¹⁹ = 81997037 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 82521293 and 82521302.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1650402 + ... + 1650451.

Almost surely, 2^82521325 is an apocalyptic number.

It is an amenable number.

82521325 is a deficient number, since it is larger than the sum of its proper divisors (19805149).

82521325 is a wasteful number, since it uses less digits than its factorization.

82521325 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3300863 (or 3300858 counting only the distinct ones).

The product of its digits is 4800, while the sum is 28.

The square root of 82521325 is about 9084.1248890578. The cubic root of 82521325 is about 435.3668900107.

The spelling of 82521325 in words is "eighty-two million, five hundred twenty-one thousand, three hundred twenty-five".