133451168 has 12 divisors (see below), whose sum is σ = 262732050. Its totient is φ = 66725568.

The previous prime is 133451167. The next prime is 133451177. The reversal of 133451168 is 861154331.

It can be written as a sum of positive squares in only one way, i.e., 133356304 + 94864 = 11548^2 + 308^2 .

It is a Harshad number since it is a multiple of its sum of digits (32), and also a Moran number because the ratio is a prime number: 4170349 = 133451168 / (1 + 3 + 3 + 4 + 5 + 1 + 1 + 6 + 8).

It is not an unprimeable number, because it can be changed into a prime (133451161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2085143 + ... + 2085206.

Almost surely, 2^133451168 is an apocalyptic number.

It is an amenable number.

133451168 is a deficient number, since it is larger than the sum of its proper divisors (129280882).

133451168 is an equidigital number, since it uses as much as digits as its factorization.

133451168 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4170359 (or 4170351 counting only the distinct ones).

The product of its digits is 8640, while the sum is 32.

The square root of 133451168 is about 11552.1066477072. The cubic root of 133451168 is about 511.0234069775.

The spelling of 133451168 in words is "one hundred thirty-three million, four hundred fifty-one thousand, one hundred sixty-eight".