133021730 has 16 divisors (see below), whose sum is σ = 240516864. Its totient is φ = 52969200.

The previous prime is 133021729. The next prime is 133021739. The reversal of 133021730 is 37120331.

It is a happy number.

133021730 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (133021739) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27596 + ... + 32055.

It is an arithmetic number, because the mean of its divisors is an integer number (15032304).

Almost surely, 2^133021730 is an apocalyptic number.

133021730 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

133021730 is a deficient number, since it is larger than the sum of its proper divisors (107495134).

133021730 is a wasteful number, since it uses less digits than its factorization.

133021730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59881.

The product of its (nonzero) digits is 378, while the sum is 20.

The square root of 133021730 is about 11533.5046711743. The cubic root of 133021730 is about 510.4746702114.

The spelling of 133021730 in words is "one hundred thirty-three million, twenty-one thousand, seven hundred thirty".