231102 has 24 divisors (see below), whose sum is σ = 515736. Its totient is φ = 74736.

The previous prime is 231079. The next prime is 231107. The reversal of 231102 is 201132.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231107) 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 11 ways as a sum of consecutive naturals, for example, 493 + ... + 839.

It is an arithmetic number, because the mean of its divisors is an integer number (21489).

2²³¹¹⁰² is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 231102, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (257868).

231102 is an abundant number, since it is smaller than the sum of its proper divisors (284634).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

231102 is a wasteful number, since it uses less digits than its factorization.

231102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 392 (or 389 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 9.

The square root of 231102 is about 480.7306938401. The cubic root of 231102 is about 61.3669541042.

Adding to 231102 its reverse (201132), we get a palindrome (432234).

It can be divided in two parts, 231 and 102, that added together give a palindrome (333).

The spelling of 231102 in words is "two hundred thirty-one thousand, one hundred two".