133640111 has 16 divisors (see below), whose sum is σ = 155831040. Its totient is φ = 113258880.

The previous prime is 133640107. The next prime is 133640123. The reversal of 133640111 is 111046331.

It is a cyclic number.

It is not a de Polignac number, because 133640111 - 2² = 133640107 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133640141) 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, 16670 + ... + 23348.

It is an arithmetic number, because the mean of its divisors is an integer number (9739440).

Almost surely, 2^133640111 is an apocalyptic number.

133640111 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

133640111 is a deficient number, since it is larger than the sum of its proper divisors (22190929).

133640111 is a wasteful number, since it uses less digits than its factorization.

133640111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6814.

The product of its (nonzero) digits is 216, while the sum is 20.

The square root of 133640111 is about 11560.2816142168. The cubic root of 133640111 is about 511.2644658481.

Adding to 133640111 its reverse (111046331), we get a palindrome (244686442).

The spelling of 133640111 in words is "one hundred thirty-three million, six hundred forty thousand, one hundred eleven".