31303041220 has 72 divisors (see below), whose sum is σ = 72575278272. Its totient is φ = 11332580160.

The previous prime is 31303041197. The next prime is 31303041221. The reversal of 31303041220 is 2214030313.

It is not an unprimeable number, because it can be changed into a prime (31303041221) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 520849 + ... + 577831.

It is an arithmetic number, because the mean of its divisors is an integer number (1007989976).

Almost surely, 2^31303041220 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 31303041220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36287639136).

31303041220 is an abundant number, since it is smaller than the sum of its proper divisors (41272237052).

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

31303041220 is a wasteful number, since it uses less digits than its factorization.

31303041220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57241 (or 57228 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 19.

Adding to 31303041220 its reverse (2214030313), we get a palindrome (33517071533).

The spelling of 31303041220 in words is "thirty-one billion, three hundred three million, forty-one thousand, two hundred twenty".