133333320 has 64 divisors (see below), whose sum is σ = 401760000. Its totient is φ = 35399168.

The previous prime is 133333309. The next prime is 133333327. The reversal of 133333320 is 23333331.

It is not an unprimeable number, because it can be changed into a prime (133333327) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26356 + ... + 31004.

It is an arithmetic number, because the mean of its divisors is an integer number (6277500).

Almost surely, 2^133333320 is an apocalyptic number.

133333320 is a gapful number since it is divisible by the number (10) 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 133333320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (200880000).

133333320 is an abundant number, since it is smaller than the sum of its proper divisors (268426680).

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

133333320 is a wasteful number, since it uses less digits than its factorization.

133333320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4902 (or 4898 counting only the distinct ones).

The product of its (nonzero) digits is 1458, while the sum is 21.

The square root of 133333320 is about 11547.0048064422. The cubic root of 133333320 is about 510.8729378999.

Adding to 133333320 its reverse (23333331), we get a palindrome (156666651).

It can be divided in two parts, 13333 and 3320, that added together give a triangular number (16653 = T₁₈₂).

The spelling of 133333320 in words is "one hundred thirty-three million, three hundred thirty-three thousand, three hundred twenty".