123205231 has 8 divisors (see below), whose sum is σ = 125783280. Its totient is φ = 120636672.

The previous prime is 123205223. The next prime is 123205249. The reversal of 123205231 is 132502321.

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 123205231 - 2³ = 123205223 is a prime.

It is a super-2 number, since 2×123205231² = 30359057891526722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 123205199 and 123205208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123205211) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27775 + ... + 31903.

It is an arithmetic number, because the mean of its divisors is an integer number (15722910).

Almost surely, 2^123205231 is an apocalyptic number.

123205231 is a deficient number, since it is larger than the sum of its proper divisors (2578049).

123205231 is an equidigital number, since it uses as much as digits as its factorization.

123205231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4745.

The product of its (nonzero) digits is 360, while the sum is 19.

The square root of 123205231 is about 11099.7851781014. The cubic root of 123205231 is about 497.5954292835.

Adding to 123205231 its reverse (132502321), we get a palindrome (255707552).

The spelling of 123205231 in words is "one hundred twenty-three million, two hundred five thousand, two hundred thirty-one".