Search a number
-
+
308161 = 7219331
BaseRepresentation
bin1001011001111000001
3120122201101
41023033001
534330121
610334401
72422300
oct1131701
9518641
10308161
111a0587
1212a401
13aa359
1480437
1561491
hex4b3c1

308161 has 12 divisors (see below), whose sum is σ = 378480. Its totient is φ = 249480.

The previous prime is 308153. The next prime is 308213. The reversal of 308161 is 161803.

It is not a de Polignac number, because 308161 - 23 = 308153 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is not an unprimeable number, because it can be changed into a prime (308101) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 766 + ... + 1096.

It is an arithmetic number, because the mean of its divisors is an integer number (31540).

2308161 is an apocalyptic number.

308161 is the 321-st hex number.

It is an amenable number.

308161 is a deficient number, since it is larger than the sum of its proper divisors (70319).

308161 is a wasteful number, since it uses less digits than its factorization.

308161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 364 (or 357 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 19.

The square root of 308161 is about 555.1225090014. The cubic root of 308161 is about 67.5448992542.

Adding to 308161 its reverse (161803), we get a palindrome (469964).

The spelling of 308161 in words is "three hundred eight thousand, one hundred sixty-one".

Divisors: 1 7 19 49 133 331 931 2317 6289 16219 44023 308161