133233240 has 64 divisors (see below), whose sum is σ = 456802560. Its totient is φ = 30453120.

The previous prime is 133233239. The next prime is 133233271. The reversal of 133233240 is 42332331.

133233240 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 78466 + ... + 80145.

It is an arithmetic number, because the mean of its divisors is an integer number (7137540).

Almost surely, 2^133233240 is an apocalyptic number.

133233240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

133233240 is an abundant number, since it is smaller than the sum of its proper divisors (323569320).

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

133233240 is a wasteful number, since it uses less digits than its factorization.

133233240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 158632 (or 158628 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 21.

The square root of 133233240 is about 11542.6704016012. The cubic root of 133233240 is about 510.7450854841.

Adding to 133233240 its reverse (42332331), we get a palindrome (175565571).

Subtracting from 133233240 its reverse (42332331), we obtain a palindrome (90900909).

The spelling of 133233240 in words is "one hundred thirty-three million, two hundred thirty-three thousand, two hundred forty".