123203231 has 4 divisors (see below), whose sum is σ = 123232200. Its totient is φ = 123174264.

The previous prime is 123203219. The next prime is 123203251. The reversal of 123203231 is 132302321.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 123203231 - 2⁶ = 123203167 is a prime.

It is a super-2 number, since 2×123203231² = 30358072257678722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123203251) 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, 6716 + ... + 17073.

It is an arithmetic number, because the mean of its divisors is an integer number (30808050).

Almost surely, 2^123203231 is an apocalyptic number.

123203231 is a deficient number, since it is larger than the sum of its proper divisors (28969).

123203231 is an equidigital number, since it uses as much as digits as its factorization.

123203231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28968.

The product of its (nonzero) digits is 216, while the sum is 17.

The square root of 123203231 is about 11099.6950859021. The cubic root of 123203231 is about 497.5927367673.

Adding to 123203231 its reverse (132302321), we get a palindrome (255505552).

It can be divided in two parts, 12320 and 3231, that added together give a palindrome (15551).

The spelling of 123203231 in words is "one hundred twenty-three million, two hundred three thousand, two hundred thirty-one".