30503 has 8 divisors (see below), whose sum is σ = 34560. Its totient is φ = 26680.

The previous prime is 30497. The next prime is 30509.

30503 is nontrivially palindromic in base 10.

It is an interprime number because it is at equal distance from previous prime (30497) and next prime (30509).

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

It is a cyclic number.

It is not a de Polignac number, because 30503 - 2¹² = 26407 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (11).

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a plaindrome in base 12.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30509) 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, 488 + ... + 546.

It is an arithmetic number, because the mean of its divisors is an integer number (4320).

2³⁰⁵⁰³ is an apocalyptic number.

30503 is a deficient number, since it is larger than the sum of its proper divisors (4057).

30503 is a wasteful number, since it uses less digits than its factorization.

30503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117.

The product of its (nonzero) digits is 45, while the sum is 11.

The square root of 30503 is about 174.6510807296. The cubic root of 30503 is about 31.2450232075.

Multiplying 30503 by its sum of digits (11), we get a palindrome (335533).

The spelling of 30503 in words is "thirty thousand, five hundred three".