401831 has 4 divisors (see below), whose sum is σ = 423000. Its totient is φ = 380664.

The previous prime is 401827. The next prime is 401839. The reversal of 401831 is 138104.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 401831 - 2² = 401827 is a prime.

It is a super-2 number, since 2×401831² = 322936305122, 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 (401839) 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, 10556 + ... + 10593.

It is an arithmetic number, because the mean of its divisors is an integer number (105750).

2⁴⁰¹⁸³¹ is an apocalyptic number.

401831 is a deficient number, since it is larger than the sum of its proper divisors (21169).

401831 is a wasteful number, since it uses less digits than its factorization.

401831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21168.

The product of its (nonzero) digits is 96, while the sum is 17.

The square root of 401831 is about 633.9014118930. The cubic root of 401831 is about 73.7928832281.

Adding to 401831 its reverse (138104), we get a palindrome (539935).

The spelling of 401831 in words is "four hundred one thousand, eight hundred thirty-one".