133530111 has 72 divisors (see below), whose sum is σ = 238432896. Its totient is φ = 71248320.

The previous prime is 133530109. The next prime is 133530139. The reversal of 133530111 is 111035331.

133530111 is a `hidden beast` number, since 133 + 530 + 1 + 1 + 1 = 666.

It is not a de Polignac number, because 133530111 - 2¹ = 133530109 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133530311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 384640 + ... + 384986.

It is an arithmetic number, because the mean of its divisors is an integer number (3311568).

Almost surely, 2^133530111 is an apocalyptic number.

133530111 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

133530111 is a deficient number, since it is larger than the sum of its proper divisors (104902785).

133530111 is a wasteful number, since it uses less digits than its factorization.

133530111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 413 (or 397 counting only the distinct ones).

The product of its (nonzero) digits is 135, while the sum is 18.

The square root of 133530111 is about 11555.5229652318. The cubic root of 133530111 is about 511.1241523645.

Adding to 133530111 its reverse (111035331), we get a palindrome (244565442).

The spelling of 133530111 in words is "one hundred thirty-three million, five hundred thirty thousand, one hundred eleven".