13223130320 has 40 divisors (see below), whose sum is σ = 30939627624. Its totient is φ = 5255557632.

The previous prime is 13223130311. The next prime is 13223130391. The reversal of 13223130320 is 2303132231.

It can be written as a sum of positive squares in 4 ways, for example, as 4179881104 + 9043249216 = 64652^2 + 95096^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 13223130292 and 13223130301.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 513839 + ... + 538958.

Almost surely, 2^13223130320 is an apocalyptic number.

13223130320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13223130320 is an abundant number, since it is smaller than the sum of its proper divisors (17716497304).

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

13223130320 is a wasteful number, since it uses less digits than its factorization.

13223130320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1052967 (or 1052961 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 20.

Adding to 13223130320 its reverse (2303132231), we get a palindrome (15526262551).

The spelling of 13223130320 in words is "thirteen billion, two hundred twenty-three million, one hundred thirty thousand, three hundred twenty".