13031031220 has 24 divisors (see below), whose sum is σ = 27546398208. Its totient is φ = 5177892000.

The previous prime is 13031031217. The next prime is 13031031227. The reversal of 13031031220 is 2213013031.

It is a super-2 number, since 2×13031031220² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 13031031194 and 13031031203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13031031227) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2154436 + ... + 2160475.

It is an arithmetic number, because the mean of its divisors is an integer number (1147766592).

Almost surely, 2^13031031220 is an apocalyptic number.

13031031220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13031031220 is an abundant number, since it is smaller than the sum of its proper divisors (14515366988).

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

13031031220 is a wasteful number, since it uses less digits than its factorization.

13031031220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4315071 (or 4315069 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 16.

Adding to 13031031220 its reverse (2213013031), we get a palindrome (15244044251).

The spelling of 13031031220 in words is "thirteen billion, thirty-one million, thirty-one thousand, two hundred twenty".