131211333 has 20 divisors (see below), whose sum is σ = 213827328. Its totient is φ = 79521480.

The previous prime is 131211323. The next prime is 131211347. The reversal of 131211333 is 333112131.

It is a happy number.

It is not a de Polignac number, because 131211333 - 2⁴ = 131211317 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131211323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 72741 + ... + 74522.

Almost surely, 2^131211333 is an apocalyptic number.

It is an amenable number.

131211333 is a deficient number, since it is larger than the sum of its proper divisors (82615995).

131211333 is a wasteful number, since it uses less digits than its factorization.

131211333 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 147286 (or 147277 counting only the distinct ones).

The product of its digits is 162, while the sum is 18.

The square root of 131211333 is about 11454.7515468473. The cubic root of 131211333 is about 508.1482674766.

Adding to 131211333 its reverse (333112131), we get a palindrome (464323464).

It can be divided in two parts, 13 and 1211333, that added together give a triangular number (1211346 = T₁₅₅₆).

The spelling of 131211333 in words is "one hundred thirty-one million, two hundred eleven thousand, three hundred thirty-three".