13131323220 has 48 divisors (see below), whose sum is σ = 37271384640. Its totient is φ = 3453716736.

The previous prime is 13131323197. The next prime is 13131323269. The reversal of 13131323220 is 2232313131.

It is a super-2 number, since 2×13131323220² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1494630 + ... + 1503389.

It is an arithmetic number, because the mean of its divisors is an integer number (776487180).

Almost surely, 2^13131323220 is an apocalyptic number.

13131323220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13131323220 is an abundant number, since it is smaller than the sum of its proper divisors (24140061420).

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

13131323220 is a wasteful number, since it uses less digits than its factorization.

13131323220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2998104 (or 2998102 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 21.

Adding to 13131323220 its reverse (2232313131), we get a palindrome (15363636351).

The spelling of 13131323220 in words is "thirteen billion, one hundred thirty-one million, three hundred twenty-three thousand, two hundred twenty".