10031311988 has 6 divisors (see below), whose sum is σ = 17554795986. Its totient is φ = 5015655992.

The previous prime is 10031311987. The next prime is 10031312033. The reversal of 10031311988 is 88911313001.

It can be written as a sum of positive squares in only one way, i.e., 8868365584 + 1162946404 = 94172^2 + 34102^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10031311981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1253913995 + ... + 1253914002.

It is an arithmetic number, because the mean of its divisors is an integer number (2925799331).

Almost surely, 2^10031311988 is an apocalyptic number.

It is an amenable number.

10031311988 is a deficient number, since it is larger than the sum of its proper divisors (7523483998).

10031311988 is a wasteful number, since it uses less digits than its factorization.

10031311988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2507828001 (or 2507827999 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 35.

Adding to 10031311988 its reverse (88911313001), we get a palindrome (98942624989).

The spelling of 10031311988 in words is "ten billion, thirty-one million, three hundred eleven thousand, nine hundred eighty-eight".