82153985 has 8 divisors (see below), whose sum is σ = 98870976. Its totient is φ = 65532400.

The previous prime is 82153961. The next prime is 82153987. The reversal of 82153985 is 58935128.

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

It is a de Polignac number, because none of the positive numbers 2^k-82153985 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (82153987) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21941 + ... + 25410.

It is an arithmetic number, because the mean of its divisors is an integer number (12358872).

Almost surely, 2^82153985 is an apocalyptic number.

It is an amenable number.

82153985 is a deficient number, since it is larger than the sum of its proper divisors (16716991).

82153985 is a wasteful number, since it uses less digits than its factorization.

82153985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47703.

The product of its digits is 86400, while the sum is 41.

The square root of 82153985 is about 9063.8835495609. The cubic root of 82153985 is about 434.7199236432.

It can be divided in two parts, 82153 and 985, that added together give a palindrome (83138).

The spelling of 82153985 in words is "eighty-two million, one hundred fifty-three thousand, nine hundred eighty-five".