133818164 has 12 divisors (see below), whose sum is σ = 234706500. Its totient is φ = 66759168.

The previous prime is 133818143. The next prime is 133818199. The reversal of 133818164 is 461818331.

It can be written as a sum of positive squares in 2 ways, for example, as 51008164 + 82810000 = 7142^2 + 9100^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35459 + ... + 39050.

It is an arithmetic number, because the mean of its divisors is an integer number (19558875).

Almost surely, 2^133818164 is an apocalyptic number.

It is an amenable number.

133818164 is a deficient number, since it is larger than the sum of its proper divisors (100888336).

133818164 is a wasteful number, since it uses less digits than its factorization.

133818164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74962 (or 74960 counting only the distinct ones).

The product of its digits is 13824, while the sum is 35.

The square root of 133818164 is about 11567.9801175486. The cubic root of 133818164 is about 511.4914230911.

The spelling of 133818164 in words is "one hundred thirty-three million, eight hundred eighteen thousand, one hundred sixty-four".