133323456 has 224 divisors, whose sum is σ = 444764160. Its totient is φ = 34366464.

The previous prime is 133323439. The next prime is 133323557. The reversal of 133323456 is 654323331.

It is a tau number, because it is divible by the number of its divisors (224).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 587215 + ... + 587441.

Almost surely, 2^133323456 is an apocalyptic number.

133323456 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 133323456, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (222382080).

133323456 is an abundant number, since it is smaller than the sum of its proper divisors (311440704).

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

133323456 is a wasteful number, since it uses less digits than its factorization.

133323456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 291 (or 281 counting only the distinct ones).

The product of its digits is 19440, while the sum is 30.

The square root of 133323456 is about 11546.5776747918. The cubic root of 133323456 is about 510.8603394613.

Adding to 133323456 its reverse (654323331), we get a palindrome (787646787).

The spelling of 133323456 in words is "one hundred thirty-three million, three hundred twenty-three thousand, four hundred fifty-six".