13550321000 has 64 divisors (see below), whose sum is σ = 31727226960. Its totient is φ = 5416800000.

The previous prime is 13550320879. The next prime is 13550321017. The reversal of 13550321000 is 12305531.

It can be written as a sum of positive squares in 8 ways, for example, as 1488570724 + 12061750276 = 38582^2 + 109826^2 .

It is a super-2 number, since 2×13550321000² (a number of 21 digits) contains 22 as substring.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2217950 + ... + 2224050.

Almost surely, 2^13550321000 is an apocalyptic number.

13550321000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13550321000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15863613480).

13550321000 is an abundant number, since it is smaller than the sum of its proper divisors (18176905960).

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

13550321000 is a wasteful number, since it uses less digits than its factorization.

13550321000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8343 (or 8329 counting only the distinct ones).

The product of its (nonzero) digits is 450, while the sum is 20.

Adding to 13550321000 its reverse (12305531), we get a palindrome (13562626531).

The spelling of 13550321000 in words is "thirteen billion, five hundred fifty million, three hundred twenty-one thousand".