181007133 has 16 divisors (see below), whose sum is σ = 245922816. Its totient is φ = 118396080.

The previous prime is 181007119. The next prime is 181007149. The reversal of 181007133 is 331700181.

It is not a de Polignac number, because 181007133 - 2⁴ = 181007117 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (181007833) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 52810 + ... + 56132.

It is an arithmetic number, because the mean of its divisors is an integer number (15370176).

Almost surely, 2^181007133 is an apocalyptic number.

It is an amenable number.

181007133 is a deficient number, since it is larger than the sum of its proper divisors (64915683).

181007133 is a wasteful number, since it uses less digits than its factorization.

181007133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3664.

The product of its (nonzero) digits is 504, while the sum is 24.

The square root of 181007133 is about 13453.8891403192. The cubic root of 181007133 is about 565.6727132222.

The spelling of 181007133 in words is "one hundred eighty-one million, seven thousand, one hundred thirty-three".