31230431304044 has 96 divisors (see below), whose sum is σ = 64286725937280. Its totient is φ = 12996362649600.

The previous prime is 31230431303993. The next prime is 31230431304047. The reversal of 31230431304044 is 44040313403213.

It is a super-2 number, since 2×31230431304044² (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 31230431304044.

It is not an unprimeable number, because it can be changed into a prime (31230431304047) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 494927504 + ... + 494990600.

It is an arithmetic number, because the mean of its divisors is an integer number (669653395180).

Almost surely, 2^{31230431304044} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31230431304044, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32143362968640).

31230431304044 is an abundant number, since it is smaller than the sum of its proper divisors (33056294633236).

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

31230431304044 is a wasteful number, since it uses less digits than its factorization.

31230431304044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65179 (or 65177 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 32.

Adding to 31230431304044 its reverse (44040313403213), we get a palindrome (75270744707257).

The spelling of 31230431304044 in words is "thirty-one trillion, two hundred thirty billion, four hundred thirty-one million, three hundred four thousand, forty-four".