13165217320 has 32 divisors (see below), whose sum is σ = 29625212520. Its totient is φ = 5265469440.

The previous prime is 13165217297. The next prime is 13165217321. The reversal of 13165217320 is 2371256131.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 12301915396 + 863301924 = 110914^2 + 29382^2 .

It is not an unprimeable number, because it can be changed into a prime (13165217321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 495904 + ... + 521776.

Almost surely, 2^13165217320 is an apocalyptic number.

13165217320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13165217320 is an abundant number, since it is smaller than the sum of its proper divisors (16459995200).

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

13165217320 is a wasteful number, since it uses less digits than its factorization.

13165217320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38605 (or 38601 counting only the distinct ones).

The product of its (nonzero) digits is 7560, while the sum is 31.

The spelling of 13165217320 in words is "thirteen billion, one hundred sixty-five million, two hundred seventeen thousand, three hundred twenty".