131123320 has 16 divisors (see below), whose sum is σ = 295027560. Its totient is φ = 52449312.

The previous prime is 131123269. The next prime is 131123323. The reversal of 131123320 is 23321131.

It is a super-3 number, since 3×131123320³ (a number of 25 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 131123294 and 131123303.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131123323) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 1639002 + ... + 1639081.

Almost surely, 2^131123320 is an apocalyptic number.

131123320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

131123320 is an abundant number, since it is smaller than the sum of its proper divisors (163904240).

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

131123320 is a wasteful number, since it uses less digits than its factorization.

131123320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3278094 (or 3278090 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 16.

The square root of 131123320 is about 11450.9091342129. The cubic root of 131123320 is about 508.0346247092.

Adding to 131123320 its reverse (23321131), we get a palindrome (154444451).

The spelling of 131123320 in words is "one hundred thirty-one million, one hundred twenty-three thousand, three hundred twenty".