85304531 has 4 divisors (see below), whose sum is σ = 91866432. Its totient is φ = 78742632.

The previous prime is 85304489. The next prime is 85304533. The reversal of 85304531 is 13540358.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 85304531 - 2¹⁰ = 85303507 is a prime.

It is a super-2 number, since 2×85304531² = 14553726018259922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 85304494 and 85304503.

It is not an unprimeable number, because it can be changed into a prime (85304533) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3280931 + ... + 3280956.

It is an arithmetic number, because the mean of its divisors is an integer number (22966608).

Almost surely, 2^85304531 is an apocalyptic number.

85304531 is a deficient number, since it is larger than the sum of its proper divisors (6561901).

85304531 is a wasteful number, since it uses less digits than its factorization.

85304531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6561900.

The product of its (nonzero) digits is 7200, while the sum is 29.

The square root of 85304531 is about 9236.0452034407. The cubic root of 85304531 is about 440.2074280238.

Adding to 85304531 its reverse (13540358), we get a palindrome (98844889).

The spelling of 85304531 in words is "eighty-five million, three hundred four thousand, five hundred thirty-one".