13445553 has 16 divisors (see below), whose sum is σ = 19660032. Its totient is φ = 8106000.

The previous prime is 13445543. The next prime is 13445557. The reversal of 13445553 is 35554431.

13445553 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 13445553 - 2⁶ = 13445489 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 13445553.

It is not an unprimeable number, because it can be changed into a prime (13445557) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5998 + ... + 7928.

It is an arithmetic number, because the mean of its divisors is an integer number (1228752).

Almost surely, 2^13445553 is an apocalyptic number.

It is an amenable number.

13445553 is a deficient number, since it is larger than the sum of its proper divisors (6214479).

13445553 is a wasteful number, since it uses less digits than its factorization.

13445553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2156.

The product of its digits is 18000, while the sum is 30.

The square root of 13445553 is about 3666.8178302174. The cubic root of 13445553 is about 237.7896182433.

Adding to 13445553 its reverse (35554431), we get a palindrome (48999984).

The spelling of 13445553 in words is "thirteen million, four hundred forty-five thousand, five hundred fifty-three".