853531 has 6 divisors (see below), whose sum is σ = 992940. Its totient is φ = 731556.

The previous prime is 853529. The next prime is 853543. The reversal of 853531 is 135358.

It is a happy number.

It is not a de Polignac number, because 853531 - 2¹ = 853529 is a prime.

It is a super-2 number, since 2×853531² = 1457030335922, 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 = 853496 and 853505.

It is not an unprimeable number, because it can be changed into a prime (853571) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 8661 + ... + 8758.

It is an arithmetic number, because the mean of its divisors is an integer number (165490).

2⁸⁵³⁵³¹ is an apocalyptic number.

853531 is a deficient number, since it is larger than the sum of its proper divisors (139409).

853531 is a wasteful number, since it uses less digits than its factorization.

853531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17433 (or 17426 counting only the distinct ones).

The product of its digits is 1800, while the sum is 25.

The square root of 853531 is about 923.8674147301. The cubic root of 853531 is about 94.8578112964.

Adding to 853531 its reverse (135358), we get a palindrome (988889).

The spelling of 853531 in words is "eight hundred fifty-three thousand, five hundred thirty-one".