31313220330 has 64 divisors (see below), whose sum is σ = 86564044800. Its totient is φ = 7100944704.

The previous prime is 31313220319. The next prime is 31313220331. The reversal of 31313220330 is 3302231313.

It is a super-3 number, since 3×31313220330³ (a number of 32 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a junction number, because it is equal to n+sod(n) for n = 31313220297 and 31313220306.

It is not an unprimeable number, because it can be changed into a prime (31313220331) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 560380 + ... + 613719.

It is an arithmetic number, because the mean of its divisors is an integer number (1352563200).

Almost surely, 2^31313220330 is an apocalyptic number.

31313220330 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

31313220330 is an abundant number, since it is smaller than the sum of its proper divisors (55250824470).

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

31313220330 is a wasteful number, since it uses less digits than its factorization.

31313220330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1174243.

The product of its (nonzero) digits is 972, while the sum is 21.

Adding to 31313220330 its reverse (3302231313), we get a palindrome (34615451643).

The spelling of 31313220330 in words is "thirty-one billion, three hundred thirteen million, two hundred twenty thousand, three hundred thirty".