131031140 has 24 divisors (see below), whose sum is σ = 278260920. Its totient is φ = 51822848.

The previous prime is 131031137. The next prime is 131031167. The reversal of 131031140 is 41130131.

It can be written as a sum of positive squares in 4 ways, for example, as 4153444 + 126877696 = 2038^2 + 11264^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35027 + ... + 38586.

It is an arithmetic number, because the mean of its divisors is an integer number (11594205).

Almost surely, 2^131031140 is an apocalyptic number.

131031140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

131031140 is an abundant number, since it is smaller than the sum of its proper divisors (147229780).

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

131031140 is a wasteful number, since it uses less digits than its factorization.

131031140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73711 (or 73709 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 14.

The square root of 131031140 is about 11446.8834186428. The cubic root of 131031140 is about 507.9155469586.

Adding to 131031140 its reverse (41130131), we get a palindrome (172161271).

The spelling of 131031140 in words is "one hundred thirty-one million, thirty-one thousand, one hundred forty".