133657161 has 32 divisors (see below), whose sum is σ = 200749056. Its totient is φ = 78408000.

The previous prime is 133657159. The next prime is 133657187. The reversal of 133657161 is 161756331.

It is a happy number.

It is not a de Polignac number, because 133657161 - 2¹ = 133657159 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (133659161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 134376 + ... + 135366.

It is an arithmetic number, because the mean of its divisors is an integer number (6273408).

Almost surely, 2^133657161 is an apocalyptic number.

133657161 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

133657161 is a deficient number, since it is larger than the sum of its proper divisors (67091895).

133657161 is a wasteful number, since it uses less digits than its factorization.

133657161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1133.

The product of its digits is 11340, while the sum is 33.

The square root of 133657161 is about 11561.0190294801. The cubic root of 133657161 is about 511.2862075452.

The spelling of 133657161 in words is "one hundred thirty-three million, six hundred fifty-seven thousand, one hundred sixty-one".