31220424201304 has 128 divisors (see below), whose sum is σ = 64334652641280. Its totient is φ = 14117558976000.

The previous prime is 31220424201277. The next prime is 31220424201313. The reversal of 31220424201304 is 40310242402213.

It is a congruent number.

It is an unprimeable number.

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, 391139559 + ... + 391219369.

It is an arithmetic number, because the mean of its divisors is an integer number (502614473760).

Almost surely, 2^{31220424201304} 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 31220424201304, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32167326320640).

31220424201304 is an abundant number, since it is smaller than the sum of its proper divisors (33114228439976).

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

31220424201304 is a wasteful number, since it uses less digits than its factorization.

31220424201304 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80321 (or 80317 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 28.

Adding to 31220424201304 its reverse (40310242402213), we get a palindrome (71530666603517).

The spelling of 31220424201304 in words is "thirty-one trillion, two hundred twenty billion, four hundred twenty-four million, two hundred one thousand, three hundred four".