131111320 has 32 divisors (see below), whose sum is σ = 305175600. Its totient is φ = 50635648.

The previous prime is 131111263. The next prime is 131111359. The reversal of 131111320 is 23111131.

It is a self number, because there is not a number n which added to its sum of digits gives 131111320.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 55354 + ... + 57673.

Almost surely, 2^131111320 is an apocalyptic number.

131111320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

131111320 is an abundant number, since it is smaller than the sum of its proper divisors (174064280).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

131111320 is a wasteful number, since it uses less digits than its factorization.

131111320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113067 (or 113063 counting only the distinct ones).

The product of its (nonzero) digits is 18, while the sum is 13.

The square root of 131111320 is about 11450.3851463608. The cubic root of 131111320 is about 508.0191263181.

Adding to 131111320 its reverse (23111131), we get a palindrome (154222451).

The spelling of 131111320 in words is "one hundred thirty-one million, one hundred eleven thousand, three hundred twenty".