13538553 has 32 divisors (see below), whose sum is σ = 21504000. Its totient is φ = 7571088.

The previous prime is 13538549. The next prime is 13538557. The reversal of 13538553 is 35583531.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (13538549) and next prime (13538557).

It is not a de Polignac number, because 13538553 - 2² = 13538549 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13538557) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 60600 + ... + 60822.

It is an arithmetic number, because the mean of its divisors is an integer number (672000).

Almost surely, 2^13538553 is an apocalyptic number.

It is an amenable number.

13538553 is a deficient number, since it is larger than the sum of its proper divisors (7965447).

13538553 is an equidigital number, since it uses as much as digits as its factorization.

13538553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 306 (or 292 counting only the distinct ones).

The product of its digits is 27000, while the sum is 33.

The square root of 13538553 is about 3679.4772726571. The cubic root of 13538553 is about 238.3366056027.

The spelling of 13538553 in words is "thirteen million, five hundred thirty-eight thousand, five hundred fifty-three".