83525581 has 8 divisors (see below), whose sum is σ = 87444864. Its totient is φ = 79630320.

The previous prime is 83525579. The next prime is 83525587. The reversal of 83525581 is 18552538.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 83525581 - 2¹ = 83525579 is a prime.

It is a super-2 number, since 2×83525581² = 13953045362775122, which contains 22 as substring.

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 83525581.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83525587) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1315 + ... + 12991.

It is an arithmetic number, because the mean of its divisors is an integer number (10930608).

Almost surely, 2^83525581 is an apocalyptic number.

It is an amenable number.

83525581 is a deficient number, since it is larger than the sum of its proper divisors (3919283).

83525581 is a wasteful number, since it uses less digits than its factorization.

83525581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12011.

The product of its digits is 48000, while the sum is 37.

The square root of 83525581 is about 9139.2330641034. The cubic root of 83525581 is about 437.1258620162.

The spelling of 83525581 in words is "eighty-three million, five hundred twenty-five thousand, five hundred eighty-one".