123533231 has 4 divisors (see below), whose sum is σ = 130035000. Its totient is φ = 117031464.

The previous prime is 123533227. The next prime is 123533239. The reversal of 123533231 is 132335321.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 132335321 = 937 ⋅141233.

It is a cyclic number.

It is not a de Polignac number, because 123533231 - 2² = 123533227 is a prime.

It is a super-2 number, since 2×123533231² = 30520918322598722, 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 = 123533197 and 123533206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123533239) 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, 3250856 + ... + 3250893.

It is an arithmetic number, because the mean of its divisors is an integer number (32508750).

Almost surely, 2^123533231 is an apocalyptic number.

123533231 is a deficient number, since it is larger than the sum of its proper divisors (6501769).

123533231 is an equidigital number, since it uses as much as digits as its factorization.

123533231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6501768.

The product of its digits is 1620, while the sum is 23.

The square root of 123533231 is about 11114.5504182580. The cubic root of 123533231 is about 498.0366082775.

Adding to 123533231 its reverse (132335321), we get a palindrome (255868552).

The spelling of 123533231 in words is "one hundred twenty-three million, five hundred thirty-three thousand, two hundred thirty-one".