133213166 has 8 divisors (see below), whose sum is σ = 199919424. Its totient is φ = 66573360.

The previous prime is 133213163. The next prime is 133213177. The reversal of 133213166 is 661312331.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133213163) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11255 + ... + 19826.

It is an arithmetic number, because the mean of its divisors is an integer number (24989928).

Almost surely, 2^133213166 is an apocalyptic number.

133213166 is a deficient number, since it is larger than the sum of its proper divisors (66706258).

133213166 is a wasteful number, since it uses less digits than its factorization.

133213166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33226.

The product of its digits is 1944, while the sum is 26.

The square root of 133213166 is about 11541.8008126982. The cubic root of 133213166 is about 510.7194331974.

Adding to 133213166 its reverse (661312331), we get a palindrome (794525497).

The spelling of 133213166 in words is "one hundred thirty-three million, two hundred thirteen thousand, one hundred sixty-six".