31303364512 has 96 divisors (see below), whose sum is σ = 72789857280. Its totient is φ = 12967741440.

The previous prime is 31303364429. The next prime is 31303364531. The reversal of 31303364512 is 21546330313.

It is a super-2 number, since 2×31303364512² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7421028 + ... + 7425244.

It is an arithmetic number, because the mean of its divisors is an integer number (758227680).

Almost surely, 2^31303364512 is an apocalyptic number.

31303364512 is a gapful number since it is divisible by the number (32) 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 31303364512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36394928640).

31303364512 is an abundant number, since it is smaller than the sum of its proper divisors (41486492768).

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

31303364512 is a wasteful number, since it uses less digits than its factorization.

31303364512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5334 (or 5326 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 31.

Adding to 31303364512 its reverse (21546330313), we get a palindrome (52849694825).

The spelling of 31303364512 in words is "thirty-one billion, three hundred three million, three hundred sixty-four thousand, five hundred twelve".