31123124032240 has 40 divisors (see below), whose sum is σ = 72431313193008. Its totient is φ = 12437198031360.

The previous prime is 31123124032213. The next prime is 31123124032307. The reversal of 31123124032240 is 4223042132113.

31123124032240 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (40).

It is a junction number, because it is equal to n+sod(n) for n = 31123124032199 and 31123124032208.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 188222806 + ... + 188388085.

Almost surely, 2^{31123124032240} is an apocalyptic number.

It is an amenable number.

31123124032240 is an abundant number, since it is smaller than the sum of its proper divisors (41308189160768).

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

31123124032240 is a wasteful number, since it uses less digits than its factorization.

31123124032240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 376611937 (or 376611931 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 28.

Adding to 31123124032240 its reverse (4223042132113), we get a palindrome (35346166164353).

The spelling of 31123124032240 in words is "thirty-one trillion, one hundred twenty-three billion, one hundred twenty-four million, thirty-two thousand, two hundred forty".