231401 has 6 divisors (see below), whose sum is σ = 244602. Its totient is φ = 218880.

The previous prime is 231379. The next prime is 231409. The reversal of 231401 is 104132.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 225625 + 5776 = 475^2 + 76^2 .

It is a de Polignac number, because none of the positive numbers 2^k-231401 is a prime.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 231401.

It is not an unprimeable number, because it can be changed into a prime (231409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 41 + ... + 681.

It is an arithmetic number, because the mean of its divisors is an integer number (40767).

2²³¹⁴⁰¹ is an apocalyptic number.

It is an amenable number.

231401 is a deficient number, since it is larger than the sum of its proper divisors (13201).

231401 is an equidigital number, since it uses as much as digits as its factorization.

231401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 679 (or 660 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 11.

The square root of 231401 is about 481.0415782445. The cubic root of 231401 is about 61.3934082410.

Adding to 231401 its reverse (104132), we get a palindrome (335533).

It can be divided in two parts, 23 and 1401, that multiplied together give a palindrome (32223).

The spelling of 231401 in words is "two hundred thirty-one thousand, four hundred one".