13551440220 has 72 divisors (see below), whose sum is σ = 41178337200. Its totient is φ = 3607361280.

The previous prime is 13551440213. The next prime is 13551440249. The reversal of 13551440220 is 2204415531.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 36856 + ... + 168704.

It is an arithmetic number, because the mean of its divisors is an integer number (571921350).

Almost surely, 2^13551440220 is an apocalyptic number.

13551440220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13551440220 is an abundant number, since it is smaller than the sum of its proper divisors (27626896980).

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

13551440220 is a wasteful number, since it uses less digits than its factorization.

13551440220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132435 (or 132430 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 27.

Adding to 13551440220 its reverse (2204415531), we get a palindrome (15755855751).

The spelling of 13551440220 in words is "thirteen billion, five hundred fifty-one million, four hundred forty thousand, two hundred twenty".