30155 has 8 divisors (see below), whose sum is σ = 37392. Its totient is φ = 23328.

The previous prime is 30139. The next prime is 30161. The reversal of 30155 is 55103.

30155 = 16² + 17² + ... + 45².

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 30155 - 2⁴ = 30139 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 104 + ... + 266.

It is an arithmetic number, because the mean of its divisors is an integer number (4674).

2³⁰¹⁵⁵ is an apocalyptic number.

30155 is a deficient number, since it is larger than the sum of its proper divisors (7237).

30155 is a wasteful number, since it uses less digits than its factorization.

30155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 205.

The product of its (nonzero) digits is 75, while the sum is 14.

The square root of 30155 is about 173.6519507521. The cubic root of 30155 is about 31.1257466098.

Adding to 30155 its reverse (55103), we get a palindrome (85258).

The spelling of 30155 in words is "thirty thousand, one hundred fifty-five".