31323013133220 has 72 divisors (see below), whose sum is σ = 95014498225920. Its totient is φ = 8352684083520.

The previous prime is 31323013133207. The next prime is 31323013133233. The reversal of 31323013133220 is 2233131032313.

31323013133220 is a `hidden beast` number, since 3 + 1 + 3 + 2 + 301 + 3 + 1 + 332 + 20 = 666.

It is an interprime number because it is at equal distance from previous prime (31323013133207) and next prime (31323013133233).

It is a super-2 number, since 2×31323013133220² (a number of 28 digits) contains 22 as substring.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 11757651 + ... + 14173509.

Almost surely, 2^{31323013133220} is an apocalyptic number.

31323013133220 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

31323013133220 is an abundant number, since it is smaller than the sum of its proper divisors (63691485092700).

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

31323013133220 is a wasteful number, since it uses less digits than its factorization.

31323013133220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2487905 (or 2487900 counting only the distinct ones).

The product of its (nonzero) digits is 5832, while the sum is 27.

Adding to 31323013133220 its reverse (2233131032313), we get a palindrome (33556144165533).

The spelling of 31323013133220 in words is "thirty-one trillion, three hundred twenty-three billion, thirteen million, one hundred thirty-three thousand, two hundred twenty".