31305300000 has 576 divisors, whose sum is σ = 115755091200. Its totient is φ = 7349760000.

The previous prime is 31305299999. The next prime is 31305300001. The reversal of 31305300000 is 350313.

It is an interprime number because it is at equal distance from previous prime (31305299999) and next prime (31305300001).

It is a Harshad number since it is a multiple of its sum of digits (15).

It is not an unprimeable number, because it can be changed into a prime (31305300001) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 89699826 + ... + 89700174.

It is an arithmetic number, because the mean of its divisors is an integer number (200963700).

Almost surely, 2^31305300000 is an apocalyptic number.

31305300000 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31305300000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (57877545600).

31305300000 is an abundant number, since it is smaller than the sum of its proper divisors (84449791200).

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

31305300000 is a wasteful number, since it uses less digits than its factorization.

31305300000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 423 (or 395 counting only the distinct ones).

The product of its (nonzero) digits is 135, while the sum is 15.

Adding to 31305300000 its reverse (350313), we get a palindrome (31305650313).

The spelling of 31305300000 in words is "thirty-one billion, three hundred five million, three hundred thousand".