123231320 has 16 divisors (see below), whose sum is σ = 277270560. Its totient is φ = 49292512.

The previous prime is 123231313. The next prime is 123231323. The reversal of 123231320 is 23132321.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123231323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1540352 + ... + 1540431.

It is an arithmetic number, because the mean of its divisors is an integer number (17329410).

Almost surely, 2^123231320 is an apocalyptic number.

123231320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123231320 is an abundant number, since it is smaller than the sum of its proper divisors (154039240).

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

123231320 is a wasteful number, since it uses less digits than its factorization.

123231320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3080794 (or 3080790 counting only the distinct ones).

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

The square root of 123231320 is about 11100.9603188193. The cubic root of 123231320 is about 497.6305491423.

Adding to 123231320 its reverse (23132321), we get a palindrome (146363641).

The spelling of 123231320 in words is "one hundred twenty-three million, two hundred thirty-one thousand, three hundred twenty".