133791156 has 48 divisors (see below), whose sum is σ = 367274880. Its totient is φ = 41973120.

The previous prime is 133791137. The next prime is 133791157. The reversal of 133791156 is 651197331.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 133791156.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133791157) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34600 + ... + 38271.

It is an arithmetic number, because the mean of its divisors is an integer number (7651560).

Almost surely, 2^133791156 is an apocalyptic number.

It is an amenable number.

133791156 is an abundant number, since it is smaller than the sum of its proper divisors (233483724).

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

133791156 is a wasteful number, since it uses less digits than its factorization.

133791156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72901 (or 72893 counting only the distinct ones).

The product of its digits is 17010, while the sum is 36.

The square root of 133791156 is about 11566.8126984057. The cubic root of 133791156 is about 511.4570100005.

It can be divided in two parts, 13379 and 1156, that added together give a triangular number (14535 = T₁₇₀).

The spelling of 133791156 in words is "one hundred thirty-three million, seven hundred ninety-one thousand, one hundred fifty-six".