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30251 = 132179
BaseRepresentation
bin111011000101011
31112111102
413120223
51432001
6352015
7154124
oct73053
945442
1030251
1120801
121560b
1310a00
14b04b
158e6b
hex762b

30251 has 6 divisors (see below), whose sum is σ = 32940. Its totient is φ = 27768.

The previous prime is 30241. The next prime is 30253. The reversal of 30251 is 15203.

Adding to 30251 its reverse (15203), we get a palindrome (45454).

It can be divided in two parts, 302 and 51, that added together give a palindrome (353).

It is not a de Polignac number, because 30251 - 26 = 30187 is a prime.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 30251.

It is not an unprimeable number, because it can be changed into a prime (30253) 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, 80 + ... + 258.

It is an arithmetic number, because the mean of its divisors is an integer number (5490).

230251 is an apocalyptic number.

30251 is a deficient number, since it is larger than the sum of its proper divisors (2689).

30251 is a wasteful number, since it uses less digits than its factorization.

30251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 205 (or 192 counting only the distinct ones).

The product of its (nonzero) digits is 30, while the sum is 11.

The square root of 30251 is about 173.9281460834. The cubic root of 30251 is about 31.1587417613.

The spelling of 30251 in words is "thirty thousand, two hundred fifty-one".

Divisors: 1 13 169 179 2327 30251