825231 has 16 divisors (see below), whose sum is σ = 1271808. Its totient is φ = 470400.

The previous prime is 825229. The next prime is 825241. The reversal of 825231 is 132528.

It is not a de Polignac number, because 825231 - 2¹ = 825229 is a prime.

It is a super-2 number, since 2×825231² = 1362012406722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 825198 and 825207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (825241) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 175 + ... + 1296.

It is an arithmetic number, because the mean of its divisors is an integer number (79488).

2⁸²⁵²³¹ is an apocalyptic number.

825231 is a deficient number, since it is larger than the sum of its proper divisors (446577).

825231 is a wasteful number, since it uses less digits than its factorization.

825231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1502.

The product of its digits is 480, while the sum is 21.

The square root of 825231 is about 908.4222586441. The cubic root of 825231 is about 93.7976255796.

Adding to 825231 its reverse (132528), we get a palindrome (957759).

The spelling of 825231 in words is "eight hundred twenty-five thousand, two hundred thirty-one".