133313111 has 4 divisors (see below), whose sum is σ = 135139392. Its totient is φ = 131486832.

The previous prime is 133313107. The next prime is 133313137. The reversal of 133313111 is 111313331.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 133313111 - 2² = 133313107 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 133313111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133313161) 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, 913031 + ... + 913176.

It is an arithmetic number, because the mean of its divisors is an integer number (33784848).

Almost surely, 2^133313111 is an apocalyptic number.

133313111 is a deficient number, since it is larger than the sum of its proper divisors (1826281).

133313111 is an equidigital number, since it uses as much as digits as its factorization.

133313111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1826280.

The product of its digits is 81, while the sum is 17.

The square root of 133313111 is about 11546.1296978685. The cubic root of 133313111 is about 510.8471260152.

Adding to 133313111 its reverse (111313331), we get a palindrome (244626442).

The spelling of 133313111 in words is "one hundred thirty-three million, three hundred thirteen thousand, one hundred eleven".