13573220 has 48 divisors (see below), whose sum is σ = 31328640. Its totient is φ = 4916736.

The previous prime is 13573207. The next prime is 13573249. The reversal of 13573220 is 2237531.

13573220 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7964 + ... + 9516.

It is an arithmetic number, because the mean of its divisors is an integer number (652680).

Almost surely, 2^13573220 is an apocalyptic number.

13573220 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 13573220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15664320).

13573220 is an abundant number, since it is smaller than the sum of its proper divisors (17755420).

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

13573220 is a wasteful number, since it uses less digits than its factorization.

13573220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1604 (or 1602 counting only the distinct ones).

The product of its (nonzero) digits is 1260, while the sum is 23.

The square root of 13573220 is about 3684.1851202132. The cubic root of 13573220 is about 238.5398615154.

The spelling of 13573220 in words is "thirteen million, five hundred seventy-three thousand, two hundred twenty".