231863 has 8 divisors (see below), whose sum is σ = 256608. Its totient is φ = 208384.

The previous prime is 231859. The next prime is 231871. The reversal of 231863 is 368132.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 231863 - 2² = 231859 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a d-powerful number, because it can be written as 2¹¹ + 3⁹ + 8⁵ + 1 + 6³ + 3¹¹ .

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231823) 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 7 ways as a sum of consecutive naturals, for example, 95 + ... + 687.

It is an arithmetic number, because the mean of its divisors is an integer number (32076).

2²³¹⁸⁶³ is an apocalyptic number.

231863 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

231863 is a deficient number, since it is larger than the sum of its proper divisors (24745).

231863 is a wasteful number, since it uses less digits than its factorization.

231863 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 633.

The product of its digits is 864, while the sum is 23.

The square root of 231863 is about 481.5215467661. The cubic root of 231863 is about 61.4342390918.

Adding to 231863 its reverse (368132), we get a palindrome (599995).

It can be divided in two parts, 23 and 1863, that multiplied together give a square (42849 = 207²).

The spelling of 231863 in words is "two hundred thirty-one thousand, eight hundred sixty-three".