13200321556 has 12 divisors (see below), whose sum is σ = 23179406292. Its totient is φ = 6577634048.

The previous prime is 13200321509. The next prime is 13200321593. The reversal of 13200321556 is 65512300231.

It can be written as a sum of positive squares in 2 ways, for example, as 12414416400 + 785905156 = 111420^2 + 28034^2 .

It is a super-2 number, since 2×13200321556² (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 3 ways as a sum of consecutive naturals, for example, 5630365 + ... + 5632708.

It is an arithmetic number, because the mean of its divisors is an integer number (1931617191).

Almost surely, 2^13200321556 is an apocalyptic number.

It is an amenable number.

13200321556 is a deficient number, since it is larger than the sum of its proper divisors (9979084736).

13200321556 is a wasteful number, since it uses less digits than its factorization.

13200321556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11263370 (or 11263368 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 28.

Adding to 13200321556 its reverse (65512300231), we get a palindrome (78712621787).

The spelling of 13200321556 in words is "thirteen billion, two hundred million, three hundred twenty-one thousand, five hundred fifty-six".