Search a number
-
+
30261 = 3711131
BaseRepresentation
bin111011000110101
31112111210
413120311
51432021
6352033
7154140
oct73065
945453
1030261
1120810
1215619
1310a0a
14b057
158e76
hex7635

30261 has 16 divisors (see below), whose sum is σ = 50688. Its totient is φ = 15600.

The previous prime is 30259. The next prime is 30269. The reversal of 30261 is 16203.

It is not a de Polignac number, because 30261 - 21 = 30259 is a prime.

It is an Ulam number.

30261 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30269) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 166 + ... + 296.

It is an arithmetic number, because the mean of its divisors is an integer number (3168).

230261 is an apocalyptic number.

It is an amenable number.

30261 is a deficient number, since it is larger than the sum of its proper divisors (20427).

30261 is a wasteful number, since it uses less digits than its factorization.

30261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 152.

The product of its (nonzero) digits is 36, while the sum is 12.

The square root of 30261 is about 173.9568912116. The cubic root of 30261 is about 31.1621747397.

Adding to 30261 its reverse (16203), we get a palindrome (46464).

It can be divided in two parts, 302 and 61, that added together give a palindrome (363).

The spelling of 30261 in words is "thirty thousand, two hundred sixty-one".

Divisors: 1 3 7 11 21 33 77 131 231 393 917 1441 2751 4323 10087 30261