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23131 is a prime number
BaseRepresentation
bin101101001011011
31011201201
411221123
51220011
6255031
7124303
oct55133
934651
1023131
1116419
1211477
13a6b4
148603
156cc1
hex5a5b

23131 has 2 divisors, whose sum is σ = 23132. Its totient is φ = 23130.

The previous prime is 23117. The next prime is 23143. The reversal of 23131 is 13132.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 23131 - 25 = 23099 is a prime.

It is a super-2 number, since 2×231312 = 1070086322, which contains 22 as substring.

It is a plaindrome in base 12.

It is not a weakly prime, because it can be changed into another prime (23431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11565 + 11566.

It is an arithmetic number, because the mean of its divisors is an integer number (11566).

223131 is an apocalyptic number.

23131 is a deficient number, since it is larger than the sum of its proper divisors (1).

23131 is an equidigital number, since it uses as much as digits as its factorization.

23131 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18, while the sum is 10.

The square root of 23131 is about 152.0887898565. The cubic root of 23131 is about 28.4925598718.

Adding to 23131 its reverse (13132), we get a palindrome (36263).

Subtracting from 23131 its reverse (13132), we obtain a palindrome (9999).

It can be divided in two parts, 231 and 31, that added together give a palindrome (262).

The spelling of 23131 in words is "twenty-three thousand, one hundred thirty-one".