31323033320320 has 128 divisors (see below), whose sum is σ = 85821439515840. Its totient is φ = 10708902150144.

The previous prime is 31323033320263. The next prime is 31323033320323. The reversal of 31323033320320 is 2302333032313.

It is a tau number, because it is divible by the number of its divisors (128).

It is a super-2 number, since 2×31323033320320² (a number of 28 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31323033320323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8321887 + ... + 11484766.

Almost surely, 2^{31323033320320} is an apocalyptic number.

It is an amenable number.

31323033320320 is an abundant number, since it is smaller than the sum of its proper divisors (54498406195520).

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

31323033320320 is a wasteful number, since it uses less digits than its factorization.

31323033320320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19807032 (or 19807020 counting only the distinct ones).

The product of its (nonzero) digits is 17496, while the sum is 28.

Adding to 31323033320320 its reverse (2302333032313), we get a palindrome (33625366352633).

The spelling of 31323033320320 in words is "thirty-one trillion, three hundred twenty-three billion, thirty-three million, three hundred twenty thousand, three hundred twenty".