Search a number
-
+
11651231 is a prime number
BaseRepresentation
bin101100011100…
…100010011111
3210220221111002
4230130202133
510440314411
61053420515
7201014414
oct54344237
923827432
1011651231
116638819
123a9a73b
13254c327
14179410b
15105233b
hexb1c89f

11651231 has 2 divisors, whose sum is σ = 11651232. Its totient is φ = 11651230.

The previous prime is 11651221. The next prime is 11651249. The reversal of 11651231 is 13215611.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-11651231 is a prime.

It is a super-2 number, since 2×116512312 = 271502367630722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11651201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5825615 + 5825616.

It is an arithmetic number, because the mean of its divisors is an integer number (5825616).

Almost surely, 211651231 is an apocalyptic number.

11651231 is a deficient number, since it is larger than the sum of its proper divisors (1).

11651231 is an equidigital number, since it uses as much as digits as its factorization.

11651231 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 180, while the sum is 20.

The square root of 11651231 is about 3413.3899572126. The cubic root of 11651231 is about 226.7030019125.

Adding to 11651231 its reverse (13215611), we get a palindrome (24866842).

The spelling of 11651231 in words is "eleven million, six hundred fifty-one thousand, two hundred thirty-one".