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BaseRepresentation
bin100101100011111
3222101021
410230133
51103411
6225011
7110032
oct45437
928337
1019231
11134a3
12b167
1389a4
147019
155a71
hex4b1f

19231 has 2 divisors, whose sum is σ = 19232. Its totient is φ = 19230.

The previous prime is 19219. The next prime is 19237. The reversal of 19231 is 13291.

It is a strong prime.

It is an emirp because it is prime and its reverse (13291) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 19231 - 29 = 18719 is a prime.

It is a super-2 number, since 2×192312 = 739662722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9615 + 9616.

It is an arithmetic number, because the mean of its divisors is an integer number (9616).

219231 is an apocalyptic number.

19231 is a deficient number, since it is larger than the sum of its proper divisors (1).

19231 is an equidigital number, since it uses as much as digits as its factorization.

19231 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 54, while the sum is 16.

The square root of 19231 is about 138.6758811041. The cubic root of 19231 is about 26.7917216579.

The spelling of 19231 in words is "nineteen thousand, two hundred thirty-one".