30051 has 20 divisors (see below), whose sum is σ = 52272.
Its totient is φ = 16848.
The previous prime is 30047. The next prime is 30059. The reversal of 30051 is 15003.
It is not a de Polignac number, because 30051 - 22 = 30047 is a prime.
It is a Harshad number since it is a multiple of its sum of digits (9).
It is an Ulam number.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (30059) by changing a digit.
It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 541 + ... + 593.
230051 is an apocalyptic number.
30051 is a deficient number, since it is larger than the sum of its proper divisors (22221).
30051 is an equidigital number, since it uses as much as digits as its factorization.
30051 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 72 (or 63 counting only the distinct ones).
The product of its (nonzero) digits is 15, while the sum is 9.
The square root of 30051 is about 173.3522425583.
The cubic root of 30051 is about 31.0899227421.
Adding to 30051 its reverse (15003), we get a palindrome (45054).
It can be divided in two parts, 300 and 51, that added together give a triangular number (351 = T26).
The spelling of 30051 in words is "thirty thousand, fifty-one".