31211344313320 has 64 divisors (see below), whose sum is σ = 74196406944000. Its totient is φ = 11783488474368.

The previous prime is 31211344313207. The next prime is 31211344313363. The reversal of 31211344313320 is 2331344311213.

It is a super-2 number, since 2×31211344313320² (a number of 28 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 76129312 + ... + 76538191.

It is an arithmetic number, because the mean of its divisors is an integer number (1159318858500).

Almost surely, 2^{31211344313320} is an apocalyptic number.

It is an amenable number.

31211344313320 is an abundant number, since it is smaller than the sum of its proper divisors (42985062630680).

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

31211344313320 is a wasteful number, since it uses less digits than its factorization.

31211344313320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 152667802 (or 152667798 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 31.

Adding to 31211344313320 its reverse (2331344311213), we get a palindrome (33542688624533).

The spelling of 31211344313320 in words is "thirty-one trillion, two hundred eleven billion, three hundred forty-four million, three hundred thirteen thousand, three hundred twenty".