31323213020330 has 64 divisors (see below), whose sum is σ = 70295690723328. Its totient is φ = 9762868388160.

The previous prime is 31323213020329. The next prime is 31323213020339. The reversal of 31323213020330 is 3302031232313.

It is a happy number.

It is a super-2 number, since 2×31323213020330² (a number of 28 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 31323213020330.

It is not an unprimeable number, because it can be changed into a prime (31323213020339) 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 31 ways as a sum of consecutive naturals, for example, 37317239 + ... + 38147381.

It is an arithmetic number, because the mean of its divisors is an integer number (1098370167552).

Almost surely, 2^{31323213020330} is an apocalyptic number.

31323213020330 is an abundant number, since it is smaller than the sum of its proper divisors (38972477702998).

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

31323213020330 is a wasteful number, since it uses less digits than its factorization.

31323213020330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 879171.

The product of its (nonzero) digits is 5832, while the sum is 26.

Adding to 31323213020330 its reverse (3302031232313), we get a palindrome (34625244252643).

The spelling of 31323213020330 in words is "thirty-one trillion, three hundred twenty-three billion, two hundred thirteen million, twenty thousand, three hundred thirty".