10131312440 has 64 divisors (see below), whose sum is σ = 23421333600. Its totient is φ = 3942678528.

The previous prime is 10131312439. The next prime is 10131312463. The reversal of 10131312440 is 4421313101.

It is a Harshad number since it is a multiple of its sum of digits (20).

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, 206792 + ... + 251048.

Almost surely, 2^10131312440 is an apocalyptic number.

10131312440 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 10131312440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11710666800).

10131312440 is an abundant number, since it is smaller than the sum of its proper divisors (13290021160).

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

10131312440 is a wasteful number, since it uses less digits than its factorization.

10131312440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44424 (or 44420 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 10131312440 its reverse (4421313101), we get a palindrome (14552625541).

The spelling of 10131312440 in words is "ten billion, one hundred thirty-one million, three hundred twelve thousand, four hundred forty".