82549521 has 12 divisors (see below), whose sum is σ = 119317380. Its totient is φ = 54996480.

The previous prime is 82549517. The next prime is 82549541. The reversal of 82549521 is 12594528.

82549521 is a `hidden beast` number, since 82 + 54 + 9 + 521 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 72437121 + 10112400 = 8511^2 + 3180^2 .

It is not a de Polignac number, because 82549521 - 2² = 82549517 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (82549541) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 22881 + ... + 26241.

It is an arithmetic number, because the mean of its divisors is an integer number (9943115).

Almost surely, 2^82549521 is an apocalyptic number.

It is an amenable number.

82549521 is a deficient number, since it is larger than the sum of its proper divisors (36767859).

82549521 is a wasteful number, since it uses less digits than its factorization.

82549521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6096 (or 6093 counting only the distinct ones).

The product of its digits is 28800, while the sum is 36.

The square root of 82549521 is about 9085.6766946662. The cubic root of 82549521 is about 435.4164699505.

The spelling of 82549521 in words is "eighty-two million, five hundred forty-nine thousand, five hundred twenty-one".