31023123242540 has 96 divisors (see below), whose sum is σ = 76577410990080. Its totient is φ = 10408016736000.

The previous prime is 31023123242537. The next prime is 31023123242609. The reversal of 31023123242540 is 4524232132013.

It is a junction number, because it is equal to n+sod(n) for n = 31023123242497 and 31023123242506.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2799941 + ... + 8359779.

It is an arithmetic number, because the mean of its divisors is an integer number (797681364480).

Almost surely, 2^{31023123242540} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31023123242540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38288705495040).

31023123242540 is an abundant number, since it is smaller than the sum of its proper divisors (45554287747540).

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

31023123242540 is a wasteful number, since it uses less digits than its factorization.

31023123242540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5561823 (or 5561821 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 32.

Adding to 31023123242540 its reverse (4524232132013), we get a palindrome (35547355374553).

The spelling of 31023123242540 in words is "thirty-one trillion, twenty-three billion, one hundred twenty-three million, two hundred forty-two thousand, five hundred forty".