82389231 has 20 divisors (see below), whose sum is σ = 123335784. Its totient is φ = 54810000.

The previous prime is 82389217. The next prime is 82389233. The reversal of 82389231 is 13298328.

It is a happy number.

It is not a de Polignac number, because 82389231 - 2¹⁹ = 81864943 is a prime.

It is a super-2 number, since 2×82389231² = 13575970769542722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82389233) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 56056 + ... + 57506.

Almost surely, 2^82389231 is an apocalyptic number.

82389231 is a gapful number since it is divisible by the number (81) formed by its first and last digit.

82389231 is a deficient number, since it is larger than the sum of its proper divisors (40946553).

82389231 is a wasteful number, since it uses less digits than its factorization.

82389231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2164 (or 2155 counting only the distinct ones).

The product of its digits is 20736, while the sum is 36.

The square root of 82389231 is about 9076.8513813987. The cubic root of 82389231 is about 435.1344649704.

The spelling of 82389231 in words is "eighty-two million, three hundred eighty-nine thousand, two hundred thirty-one".