13553520 has 40 divisors (see below), whose sum is σ = 42016656. Its totient is φ = 3614208.

The previous prime is 13553513. The next prime is 13553537. The reversal of 13553520 is 2535531.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27997 + ... + 28476.

Almost surely, 2^13553520 is an apocalyptic number.

13553520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13553520 is an abundant number, since it is smaller than the sum of its proper divisors (28463136).

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

13553520 is a wasteful number, since it uses less digits than its factorization.

13553520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56489 (or 56483 counting only the distinct ones).

The product of its (nonzero) digits is 2250, while the sum is 24.

The square root of 13553520 is about 3681.5105595394. The cubic root of 13553520 is about 238.4244010578.

The spelling of 13553520 in words is "thirteen million, five hundred fifty-three thousand, five hundred twenty".