133605215 has 8 divisors (see below), whose sum is σ = 161158128. Its totient is φ = 106329600.

The previous prime is 133605191. The next prime is 133605221. The reversal of 133605215 is 512506331.

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

It is not a de Polignac number, because 133605215 - 2⁶ = 133605151 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 68261 + ... + 70190.

It is an arithmetic number, because the mean of its divisors is an integer number (20144766).

Almost surely, 2^133605215 is an apocalyptic number.

133605215 is a deficient number, since it is larger than the sum of its proper divisors (27552913).

133605215 is a wasteful number, since it uses less digits than its factorization.

133605215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138649.

The product of its (nonzero) digits is 2700, while the sum is 26.

The square root of 133605215 is about 11558.7722098846. The cubic root of 133605215 is about 511.2199616500.

The spelling of 133605215 in words is "one hundred thirty-three million, six hundred five thousand, two hundred fifteen".