75431 has 2 divisors, whose sum is σ = 75432. Its totient is φ = 75430.
The previous prime is 75407. The next prime is 75437. The reversal of 75431 is 13457.
It is a happy number.
It is a strong prime.
It is an emirp because it is prime and its reverse (13457) is a distict prime.
It is a cyclic number.
It is not a de Polignac number, because 75431 - 26 = 75367 is a prime.
It is a super-2 number, since 2×754312 = 11379671522, which contains 22 as substring.
It is a Chen prime.
It is a plaindrome in base 12.
It is a nialpdrome in base 10.
It is a congruent number.
It is not a weakly prime, because it can be changed into another prime (75437) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37715 + 37716.
It is an arithmetic number, because the mean of its divisors is an integer number (37716).
275431 is an apocalyptic number.
75431 is a deficient number, since it is larger than the sum of its proper divisors (1).
75431 is an equidigital number, since it uses as much as digits as its factorization.
75431 is an odious number, because the sum of its binary digits is odd.
The product of its digits is 420, while the sum is 20.
The square root of 75431 is about 274.6470462248. The cubic root of 75431 is about 42.2522611210.
Adding to 75431 its reverse (13457), we get a palindrome (88888).
The spelling of 75431 in words is "seventy-five thousand, four hundred thirty-one".
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