131321311 has 24 divisors (see below), whose sum is σ = 154064880. Its totient is φ = 110976000.

The previous prime is 131321303. The next prime is 131321317. The reversal of 131321311 is 113123131.

It is not a de Polignac number, because 131321311 - 2³ = 131321303 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131321317) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 320875 + ... + 321283.

It is an arithmetic number, because the mean of its divisors is an integer number (6419370).

Almost surely, 2^131321311 is an apocalyptic number.

131321311 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

131321311 is a deficient number, since it is larger than the sum of its proper divisors (22743569).

131321311 is a wasteful number, since it uses less digits than its factorization.

131321311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 555 (or 538 counting only the distinct ones).

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

The square root of 131321311 is about 11459.5510819578. The cubic root of 131321311 is about 508.2902001444.

Adding to 131321311 its reverse (113123131), we get a palindrome (244444442).

The spelling of 131321311 in words is "one hundred thirty-one million, three hundred twenty-one thousand, three hundred eleven".