31231023202000 has 160 divisors (see below), whose sum is σ = 79092913086720. Its totient is φ = 11904835289600.

The previous prime is 31231023201971. The next prime is 31231023202003. The reversal of 31231023202000 is 20232013213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31231023202003) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11112039 + ... + 13635961.

It is an arithmetic number, because the mean of its divisors is an integer number (494330706792).

Almost surely, 2^{31231023202000} 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 31231023202000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39546456543360).

31231023202000 is an abundant number, since it is smaller than the sum of its proper divisors (47861889884720).

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

31231023202000 is a wasteful number, since it uses less digits than its factorization.

31231023202000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2524238 (or 2524222 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 19.

Adding to 31231023202000 its reverse (20232013213), we get a palindrome (31251255215213).

The spelling of 31231023202000 in words is "thirty-one trillion, two hundred thirty-one billion, twenty-three million, two hundred two thousand".