31030302102320 has 20 divisors (see below), whose sum is σ = 72145452388080. Its totient is φ = 12412120840896.

The previous prime is 31030302102313. The next prime is 31030302102323. The reversal of 31030302102320 is 2320120303013.

It is a tau number, because it is divible by the number of its divisors (20).

It is a super-2 number, since 2×31030302102320² (a number of 28 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 31030302102292 and 31030302102301.

It is not an unprimeable number, because it can be changed into a prime (31030302102323) 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 3 ways as a sum of consecutive naturals, for example, 193939388060 + ... + 193939388219.

It is an arithmetic number, because the mean of its divisors is an integer number (3607272619404).

Almost surely, 2^{31030302102320} is an apocalyptic number.

It is an amenable number.

31030302102320 is an abundant number, since it is smaller than the sum of its proper divisors (41115150285760).

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

31030302102320 is a wasteful number, since it uses less digits than its factorization.

31030302102320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 387878776292 (or 387878776286 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 20.

Adding to 31030302102320 its reverse (2320120303013), we get a palindrome (33350422405333).

The spelling of 31030302102320 in words is "thirty-one trillion, thirty billion, three hundred two million, one hundred two thousand, three hundred twenty".