131945140 has 12 divisors (see below), whose sum is σ = 277084836. Its totient is φ = 52778048.

The previous prime is 131945119. The next prime is 131945147. The reversal of 131945140 is 41549131.

It can be written as a sum of positive squares in 2 ways, for example, as 91470096 + 40475044 = 9564^2 + 6362^2 .

It is a junction number, because it is equal to n+sod(n) for n = 131945099 and 131945108.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131945147) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3298609 + ... + 3298648.

It is an arithmetic number, because the mean of its divisors is an integer number (23090403).

Almost surely, 2^131945140 is an apocalyptic number.

131945140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

131945140 is an abundant number, since it is smaller than the sum of its proper divisors (145139696).

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

131945140 is a wasteful number, since it uses less digits than its factorization.

131945140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6597266 (or 6597264 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 28.

The square root of 131945140 is about 11486.7375699108. The cubic root of 131945140 is about 509.0937899304.

The spelling of 131945140 in words is "one hundred thirty-one million, nine hundred forty-five thousand, one hundred forty".