131333311 has 4 divisors (see below), whose sum is σ = 133811352. Its totient is φ = 128855272.

The previous prime is 131333303. The next prime is 131333317. The reversal of 131333311 is 113333131.

It is a happy number.

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 131333311 - 2³ = 131333303 is a prime.

It is a super-4 number, since 4×131333311⁴ (a number of 34 digits) contains 4444 as substring. Note that it is a super-d number also for d = 3.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131333317) 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, 1238941 + ... + 1239046.

It is an arithmetic number, because the mean of its divisors is an integer number (33452838).

Almost surely, 2^131333311 is an apocalyptic number.

131333311 is a deficient number, since it is larger than the sum of its proper divisors (2478041).

131333311 is an equidigital number, since it uses as much as digits as its factorization.

131333311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2478040.

The product of its digits is 243, while the sum is 19.

The square root of 131333311 is about 11460.0746507167. The cubic root of 131333311 is about 508.3056820099.

Adding to 131333311 its reverse (113333131), we get a palindrome (244666442).

The spelling of 131333311 in words is "one hundred thirty-one million, three hundred thirty-three thousand, three hundred eleven".