56431 has 2 divisors, whose sum is σ = 56432.
Its totient is φ = 56430.
The previous prime is 56417. The next prime is 56437. The reversal of 56431 is 13465.
Adding to 56431 its reverse (13465), we get a palindrome (69896).
It can be divided in two parts, 564 and 31, that added together give a palindrome (595).
It is a strong prime.
It is a cyclic number.
It is not a de Polignac number, because 56431 - 213 = 48239 is a prime.
It is a super-2 number, since 2×564312 = 6368915522, which contains 22 as substring.
It is a junction number, because it is equal to n+sod(n) for n = 56399 and 56408.
It is a congruent number.
It is not a weakly prime, because it can be changed into another prime (56437) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (11) of ones.
It is a good prime.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28215 + 28216.
It is an arithmetic number, because the mean of its divisors is an integer number (28216).
256431 is an apocalyptic number.
56431 is a deficient number, since it is larger than the sum of its proper divisors (1).
56431 is an equidigital number, since it uses as much as digits as its factorization.
56431 is an odious number, because the sum of its binary digits is odd.
The product of its digits is 360, while the sum is 19.
The square root of 56431 is about 237.5520995487.
The cubic root of 56431 is about 38.3565245091.
The spelling of 56431 in words is "fifty-six thousand, four hundred thirty-one".