231612 has 12 divisors (see below), whose sum is σ = 540456. Its totient is φ = 77200.

The previous prime is 231611. The next prime is 231613. The reversal of 231612 is 216132.

231612 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (231611) and next prime (231613).

It is a tau number, because it is divible by the number of its divisors (12).

It is a nude number because it is divisible by every one of its digits.

It is a plaindrome in base 16.

It is a junction number, because it is equal to n+sod(n) for n = 231591 and 231600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231611) 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, 9639 + ... + 9662.

It is an arithmetic number, because the mean of its divisors is an integer number (45038).

2²³¹⁶¹² is an apocalyptic number.

It is an amenable number.

231612 is an abundant number, since it is smaller than the sum of its proper divisors (308844).

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

231612 is a wasteful number, since it uses less digits than its factorization.

231612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19308 (or 19306 counting only the distinct ones).

The product of its digits is 72, while the sum is 15.

The square root of 231612 is about 481.2608440337. The cubic root of 231612 is about 61.4120628331.

Subtracting from 231612 its product of digits (72), we obtain a triangular number (231540 = T₆₈₀).

Adding to 231612 its reverse (216132), we get a palindrome (447744).

The spelling of 231612 in words is "two hundred thirty-one thousand, six hundred twelve".