31313230000 has 200 divisors, whose sum is σ = 82704776000. Its totient is φ = 11411712000.

The previous prime is 31313229977. The next prime is 31313230027. The reversal of 31313230000 is 3231313.

It is a tau number, because it is divible by the number of its divisors (200).

It is a Harshad number since it is a multiple of its sum of digits (16).

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 10268476 + ... + 10271524.

It is an arithmetic number, because the mean of its divisors is an integer number (413523880).

Almost surely, 2^31313230000 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 31313230000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41352388000).

31313230000 is an abundant number, since it is smaller than the sum of its proper divisors (51391546000).

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

31313230000 is a wasteful number, since it uses less digits than its factorization.

31313230000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3169 (or 3148 counting only the distinct ones).

The product of its (nonzero) digits is 162, while the sum is 16.

Adding to 31313230000 its reverse (3231313), we get a palindrome (31316461313).

The spelling of 31313230000 in words is "thirty-one billion, three hundred thirteen million, two hundred thirty thousand".