828381231 has 12 divisors (see below), whose sum is σ = 1196984152. Its totient is φ = 552054096.

The previous prime is 828381227. The next prime is 828381241. The reversal of 828381231 is 132183828.

It is not a de Polignac number, because 828381231 - 2² = 828381227 is a prime.

It is a super-2 number, since 2×828381231² = 1372430927746150722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (828381221) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12180 + ... + 42486.

Almost surely, 2^828381231 is an apocalyptic number.

828381231 is a deficient number, since it is larger than the sum of its proper divisors (368602921).

828381231 is a wasteful number, since it uses less digits than its factorization.

828381231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33350 (or 33347 counting only the distinct ones).

The product of its digits is 18432, while the sum is 36.

The square root of 828381231 is about 28781.6127240987. The cubic root of 828381231 is about 939.1682815847.

The spelling of 828381231 in words is "eight hundred twenty-eight million, three hundred eighty-one thousand, two hundred thirty-one".