133155636 has 12 divisors (see below), whose sum is σ = 310696512. Its totient is φ = 44385208.

The previous prime is 133155623. The next prime is 133155641. The reversal of 133155636 is 636551331.

It is a tau number, because it is divible by the number of its divisors (12).

It is a junction number, because it is equal to n+sod(n) for n = 133155597 and 133155606.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5548140 + ... + 5548163.

It is an arithmetic number, because the mean of its divisors is an integer number (25891376).

Almost surely, 2^133155636 is an apocalyptic number.

It is an amenable number.

133155636 is an abundant number, since it is smaller than the sum of its proper divisors (177540876).

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

133155636 is a wasteful number, since it uses less digits than its factorization.

133155636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11096310 (or 11096308 counting only the distinct ones).

The product of its digits is 24300, while the sum is 33.

The square root of 133155636 is about 11539.3082981607. The cubic root of 133155636 is about 510.6459021280.

The spelling of 133155636 in words is "one hundred thirty-three million, one hundred fifty-five thousand, six hundred thirty-six".