133536021 has 8 divisors (see below), whose sum is σ = 178390560. Its totient is φ = 88852752.

The previous prime is 133536001. The next prime is 133536031. The reversal of 133536021 is 120635331.

It is a happy number.

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

It is not a de Polignac number, because 133536021 - 2⁹ = 133535509 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 133535982 and 133536000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133536001) 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, 40986 + ... + 44123.

It is an arithmetic number, because the mean of its divisors is an integer number (22298820).

Almost surely, 2^133536021 is an apocalyptic number.

It is an amenable number.

133536021 is a deficient number, since it is larger than the sum of its proper divisors (44854539).

133536021 is an equidigital number, since it uses as much as digits as its factorization.

133536021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85635.

The product of its (nonzero) digits is 1620, while the sum is 24.

The square root of 133536021 is about 11555.7786842774. The cubic root of 133536021 is about 511.1316929838.

The spelling of 133536021 in words is "one hundred thirty-three million, five hundred thirty-six thousand, twenty-one".