30501 has 6 divisors (see below), whose sum is σ = 44070. Its totient is φ = 20328.

The previous prime is 30497. The next prime is 30509. The reversal of 30501 is 10503.

It can be written as a sum of positive squares in only one way, i.e., 30276 + 225 = 174^2 + 15^2 .

It is not a de Polignac number, because 30501 - 2² = 30497 is a prime.

It is a super-2 number, since 2×30501² = 1860622002, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (9), and also a Moran number because the ratio is a prime number: 3389 = 30501 / (3 + 0 + 5 + 0 + 1).

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

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 5 ways as a sum of consecutive naturals, for example, 1686 + ... + 1703.

It is an arithmetic number, because the mean of its divisors is an integer number (7345).

2³⁰⁵⁰¹ is an apocalyptic number.

It is an amenable number.

30501 is a deficient number, since it is larger than the sum of its proper divisors (13569).

30501 is a wasteful number, since it uses less digits than its factorization.

30501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3395 (or 3392 counting only the distinct ones).

The product of its (nonzero) digits is 15, while the sum is 9.

The square root of 30501 is about 174.6453549339. The cubic root of 30501 is about 31.2443403084.

The spelling of 30501 in words is "thirty thousand, five hundred one".