133001311 has 4 divisors (see below), whose sum is σ = 140001400. Its totient is φ = 126001224.

The previous prime is 133001299. The next prime is 133001329. The reversal of 133001311 is 113100331.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-133001311 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 133001291 and 133001300.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133001371) 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, 3500016 + ... + 3500053.

It is an arithmetic number, because the mean of its divisors is an integer number (35000350).

Almost surely, 2^133001311 is an apocalyptic number.

133001311 is a deficient number, since it is larger than the sum of its proper divisors (7000089).

133001311 is an equidigital number, since it uses as much as digits as its factorization.

133001311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7000088.

The product of its (nonzero) digits is 27, while the sum is 13.

The square root of 133001311 is about 11532.6194335892. The cubic root of 133001311 is about 510.4485493772.

Adding to 133001311 its reverse (113100331), we get a palindrome (246101642).

The spelling of 133001311 in words is "one hundred thirty-three million, one thousand, three hundred eleven".