131211331 has 8 divisors (see below), whose sum is σ = 132295680. Its totient is φ = 130131072.

The previous prime is 131211323. The next prime is 131211347. The reversal of 131211331 is 133112131.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 131211331 - 2³ = 131211323 is a prime.

It is a super-2 number, since 2×131211331² = 34432826765583122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131311331) 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 7 ways as a sum of consecutive naturals, for example, 101950 + ... + 103228.

It is an arithmetic number, because the mean of its divisors is an integer number (16536960).

Almost surely, 2^131211331 is an apocalyptic number.

131211331 is a deficient number, since it is larger than the sum of its proper divisors (1084349).

131211331 is a wasteful number, since it uses less digits than its factorization.

131211331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2045.

The product of its digits is 54, while the sum is 16.

The square root of 131211331 is about 11454.7514595473. The cubic root of 131211331 is about 508.1482648948.

Adding to 131211331 its reverse (133112131), we get a palindrome (264323462).

The spelling of 131211331 in words is "one hundred thirty-one million, two hundred eleven thousand, three hundred thirty-one".