13551603 has 12 divisors (see below), whose sum is σ = 19566360. Its totient is φ = 8339136.

The previous prime is 13551599. The next prime is 13551649. The reversal of 13551603 is 30615531.

It is not a de Polignac number, because 13551603 - 2² = 13551599 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13551683) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12858 + ... + 13871.

It is an arithmetic number, because the mean of its divisors is an integer number (1630530).

Almost surely, 2^13551603 is an apocalyptic number.

13551603 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

13551603 is a deficient number, since it is larger than the sum of its proper divisors (6014757).

13551603 is a wasteful number, since it uses less digits than its factorization.

13551603 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26758 (or 26745 counting only the distinct ones).

The product of its (nonzero) digits is 1350, while the sum is 24.

The square root of 13551603 is about 3681.2501952462. The cubic root of 13551603 is about 238.4131596699.

The spelling of 13551603 in words is "thirteen million, five hundred fifty-one thousand, six hundred three".