131013440 has 112 divisors (see below), whose sum is σ = 330061824. Its totient is φ = 49459200.

The previous prime is 131013439. The next prime is 131013457. The reversal of 131013440 is 44310131.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 466100 + ... + 466380.

Almost surely, 2^131013440 is an apocalyptic number.

131013440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 131013440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (165030912).

131013440 is an abundant number, since it is smaller than the sum of its proper divisors (199048384).

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

131013440 is a wasteful number, since it uses less digits than its factorization.

131013440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 376 (or 366 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 131013440 is about 11446.1102563273. The cubic root of 131013440 is about 507.8926757795.

Adding to 131013440 its reverse (44310131), we get a palindrome (175323571).

The spelling of 131013440 in words is "one hundred thirty-one million, thirteen thousand, four hundred forty".