133433250 has 64 divisors (see below), whose sum is σ = 336960000. Its totient is φ = 35164800.

The previous prime is 133433233. The next prime is 133433273. The reversal of 133433250 is 52334331.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 133433250.

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, 65751 + ... + 67749.

It is an arithmetic number, because the mean of its divisors is an integer number (5265000).

Almost surely, 2^133433250 is an apocalyptic number.

133433250 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 133433250, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (168480000).

133433250 is an abundant number, since it is smaller than the sum of its proper divisors (203526750).

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

133433250 is a wasteful number, since it uses less digits than its factorization.

133433250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2108 (or 2098 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 24.

The square root of 133433250 is about 11551.3310921296. The cubic root of 133433250 is about 511.0005348728. Note that the first 3 decimals are identical.

Adding to 133433250 its reverse (52334331), we get a palindrome (185767581).

The spelling of 133433250 in words is "one hundred thirty-three million, four hundred thirty-three thousand, two hundred fifty".