51603 has 8 divisors (see below), whose sum is σ = 69888. Its totient is φ = 33864.

The previous prime is 51599. The next prime is 51607. The reversal of 51603 is 30615.

51603 is nontrivially palindromic in base 2.

51603 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 an interprime number because it is at equal distance from previous prime (51599) and next prime (51607).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 51603 - 2² = 51599 is a prime.

51603 is a lucky number.

It is a nialpdrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (51607) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 226 + ... + 392.

It is an arithmetic number, because the mean of its divisors is an integer number (8736).

2⁵¹⁶⁰³ is an apocalyptic number.

51603 is a deficient number, since it is larger than the sum of its proper divisors (18285).

51603 is a wasteful number, since it uses less digits than its factorization.

51603 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 273.

The product of its (nonzero) digits is 90, while the sum is 15.

The square root of 51603 is about 227.1629371178. The cubic root of 51603 is about 37.2298811826.

The spelling of 51603 in words is "fifty-one thousand, six hundred three".