82185531 has 12 divisors (see below), whose sum is σ = 116407032. Its totient is φ = 51566848.

The previous prime is 82185529. The next prime is 82185533. The reversal of 82185531 is 13558128.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (82185529) and next prime (82185533).

It is not a de Polignac number, because 82185531 - 2¹ = 82185529 is a prime.

It is a super-2 number, since 2×82185531² = 13508923011503922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 82185492 and 82185501.

It is not an unprimeable number, because it can be changed into a prime (82185533) 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, 46530 + ... + 48263.

It is an arithmetic number, because the mean of its divisors is an integer number (9700586).

Almost surely, 2^82185531 is an apocalyptic number.

82185531 is a deficient number, since it is larger than the sum of its proper divisors (34221501).

82185531 is a wasteful number, since it uses less digits than its factorization.

82185531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94830 (or 94813 counting only the distinct ones).

The product of its digits is 9600, while the sum is 33.

The square root of 82185531 is about 9065.6235858324. The cubic root of 82185531 is about 434.7755586795.

The spelling of 82185531 in words is "eighty-two million, one hundred eighty-five thousand, five hundred thirty-one".