123533312 has 72 divisors (see below), whose sum is σ = 287567280. Its totient is φ = 52899840.

The previous prime is 123533273. The next prime is 123533321. The reversal of 123533312 is 213335321.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 99737 + ... + 100967.

It is an arithmetic number, because the mean of its divisors is an integer number (3993990).

Almost surely, 2^123533312 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 123533312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (143783640).

123533312 is an abundant number, since it is smaller than the sum of its proper divisors (164033968).

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

123533312 is an equidigital number, since it uses as much as digits as its factorization.

123533312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1267 (or 1240 counting only the distinct ones).

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

The square root of 123533312 is about 11114.5540621295. The cubic root of 123533312 is about 498.0367171307.

Adding to 123533312 its reverse (213335321), we get a palindrome (336868633).

The spelling of 123533312 in words is "one hundred twenty-three million, five hundred thirty-three thousand, three hundred twelve".