131011240 has 32 divisors (see below), whose sum is σ = 296061480. Its totient is φ = 52175872.

The previous prime is 131011229. The next prime is 131011247. The reversal of 131011240 is 42110131.

It can be written as a sum of positive squares in 4 ways, for example, as 47361924 + 83649316 = 6882^2 + 9146^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 131011240.

It is not an unprimeable number, because it can be changed into a prime (131011247) 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, 2292 + ... + 16348.

Almost surely, 2^131011240 is an apocalyptic number.

131011240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

131011240 is an abundant number, since it is smaller than the sum of its proper divisors (165050240).

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

131011240 is a wasteful number, since it uses less digits than its factorization.

131011240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14301 (or 14297 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 13.

The square root of 131011240 is about 11446.0141534073. The cubic root of 131011240 is about 507.8898328901.

Adding to 131011240 its reverse (42110131), we get a palindrome (173121371).

It can be divided in two parts, 13101 and 1240, that added together give a palindrome (14341).

The spelling of 131011240 in words is "one hundred thirty-one million, eleven thousand, two hundred forty".