133205982 has 128 divisors (see below), whose sum is σ = 353009664. Its totient is φ = 32514048.

The previous prime is 133205911. The next prime is 133206043. The reversal of 133205982 is 289502331.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1048803 + ... + 1048929.

It is an arithmetic number, because the mean of its divisors is an integer number (2757888).

Almost surely, 2^133205982 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 133205982, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (176504832).

133205982 is an abundant number, since it is smaller than the sum of its proper divisors (219803682).

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

133205982 is a wasteful number, since it uses less digits than its factorization.

133205982 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 282.

The product of its (nonzero) digits is 12960, while the sum is 33.

The square root of 133205982 is about 11541.4895919028. The cubic root of 133205982 is about 510.7102522371.

The spelling of 133205982 in words is "one hundred thirty-three million, two hundred five thousand, nine hundred eighty-two".