131123140 has 24 divisors (see below), whose sum is σ = 277466112. Its totient is φ = 52047840.

The previous prime is 131123131. The next prime is 131123141. The reversal of 131123140 is 41321131.

It is not an unprimeable number, because it can be changed into a prime (131123141) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22404 + ... + 27643.

It is an arithmetic number, because the mean of its divisors is an integer number (11561088).

Almost surely, 2^131123140 is an apocalyptic number.

131123140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

131123140 is an abundant number, since it is smaller than the sum of its proper divisors (146342972).

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

131123140 is a wasteful number, since it uses less digits than its factorization.

131123140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50187 (or 50185 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 131123140 is about 11450.9012745722. The cubic root of 131123140 is about 508.0343922403.

Adding to 131123140 its reverse (41321131), we get a palindrome (172444271).

The spelling of 131123140 in words is "one hundred thirty-one million, one hundred twenty-three thousand, one hundred forty".