133005656 has 32 divisors (see below), whose sum is σ = 286295040. Its totient is φ = 56745888.

The previous prime is 133005641. The next prime is 133005661. The reversal of 133005656 is 656500331.

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, 7481 + ... + 17943.

It is an arithmetic number, because the mean of its divisors is an integer number (8946720).

Almost surely, 2^133005656 is an apocalyptic number.

It is an amenable number.

133005656 is an abundant number, since it is smaller than the sum of its proper divisors (153289384).

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

133005656 is a wasteful number, since it uses less digits than its factorization.

133005656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10703 (or 10699 counting only the distinct ones).

The product of its (nonzero) digits is 8100, while the sum is 29.

The square root of 133005656 is about 11532.8078107632. The cubic root of 133005656 is about 510.4541079059.

Adding to 133005656 its reverse (656500331), we get a palindrome (789505987).

The spelling of 133005656 in words is "one hundred thirty-three million, five thousand, six hundred fifty-six".