10031131440 has 120 divisors (see below), whose sum is σ = 36750446928. Its totient is φ = 2431787520.

The previous prime is 10031131421. The next prime is 10031131447. The reversal of 10031131440 is 4413113001.

10031131440 is a `hidden beast` number, since 1 + 0 + 0 + 311 + 314 + 40 = 666.

It is a tau number, because it is divible by the number of its divisors (120).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (10031131447) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 625359 + ... + 641198.

Almost surely, 2^10031131440 is an apocalyptic number.

10031131440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

10031131440 is an abundant number, since it is smaller than the sum of its proper divisors (26719315488).

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

10031131440 is a wasteful number, since it uses less digits than its factorization.

10031131440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1266587 (or 1266578 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 10031131440 its reverse (4413113001), we get a palindrome (14444244441).

The spelling of 10031131440 in words is "ten billion, thirty-one million, one hundred thirty-one thousand, four hundred forty".