133521801 has 8 divisors (see below), whose sum is σ = 203461824. Its totient is φ = 76298160.

The previous prime is 133521767. The next prime is 133521803. The reversal of 133521801 is 108125331.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 133521801 - 2⁶ = 133521737 is a prime.

It is not an unprimeable number, because it can be changed into a prime (133521803) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3179070 + ... + 3179111.

It is an arithmetic number, because the mean of its divisors is an integer number (25432728).

Almost surely, 2^133521801 is an apocalyptic number.

It is an amenable number.

133521801 is a deficient number, since it is larger than the sum of its proper divisors (69940023).

133521801 is an equidigital number, since it uses as much as digits as its factorization.

133521801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6358191.

The product of its (nonzero) digits is 720, while the sum is 24.

The square root of 133521801 is about 11555.1633913156. The cubic root of 133521801 is about 511.1135491885.

The spelling of 133521801 in words is "one hundred thirty-three million, five hundred twenty-one thousand, eight hundred one".