31305320212300 has 72 divisors (see below), whose sum is σ = 69328324953216. Its totient is φ = 12265619957760.

The previous prime is 31305320212277. The next prime is 31305320212349. The reversal of 31305320212300 is 321202350313.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1648357 + ... + 8082556.

It is an arithmetic number, because the mean of its divisors is an integer number (962893402128).

Almost surely, 2^{31305320212300} is an apocalyptic number.

It is an amenable number.

31305320212300 is an abundant number, since it is smaller than the sum of its proper divisors (38023004740916).

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

31305320212300 is a wasteful number, since it uses less digits than its factorization.

31305320212300 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9731587 (or 9731580 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 25.

Adding to 31305320212300 its reverse (321202350313), we get a palindrome (31626522562613).

The spelling of 31305320212300 in words is "thirty-one trillion, three hundred five billion, three hundred twenty million, two hundred twelve thousand, three hundred".