801831 has 4 divisors (see below), whose sum is σ = 1069112. Its totient is φ = 534552.

The previous prime is 801817. The next prime is 801833. The reversal of 801831 is 138108.

It is a happy number.

801831 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 801831 - 2¹⁸ = 539687 is a prime.

It is a super-2 number, since 2×801831² = 1285865905122, which contains 22 as substring.

It is a D-number.

It is a Duffinian number.

801831 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 801798 and 801807.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 801831.

It is not an unprimeable number, because it can be changed into a prime (801833) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 133636 + ... + 133641.

It is an arithmetic number, because the mean of its divisors is an integer number (267278).

2⁸⁰¹⁸³¹ is an apocalyptic number.

801831 is a deficient number, since it is larger than the sum of its proper divisors (267281).

801831 is a wasteful number, since it uses less digits than its factorization.

801831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 267280.

The product of its (nonzero) digits is 192, while the sum is 21.

The square root of 801831 is about 895.4501661176. The cubic root of 801831 is about 92.9025456185.

Adding to 801831 its reverse (138108), we get a palindrome (939939).

The spelling of 801831 in words is "eight hundred one thousand, eight hundred thirty-one".