73431 has 12 divisors (see below), whose sum is σ = 109200.
Its totient is φ = 47520.
The previous prime is 73421. The next prime is 73433. The reversal of 73431 is 13437.
Adding to 73431 its reverse (13437), we get a palindrome (86868).
It is not a de Polignac number, because 73431 - 27 = 73303 is a prime.
It is a super-2 number, since 2×734312 = 10784223522, which contains 22 as substring.
73431 is a lucky number.
It is a nialpdrome in base 5.
It is a congruent number.
It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 73431.
It is not an unprimeable number, because it can be changed into a prime (73433) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (11) of ones.
It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 270 + ... + 468.
It is an arithmetic number, because the mean of its divisors is an integer number (9100).
273431 is an apocalyptic number.
73431 is a deficient number, since it is larger than the sum of its proper divisors (35769).
73431 is a wasteful number, since it uses less digits than its factorization.
73431 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 246 (or 243 counting only the distinct ones).
The product of its digits is 252, while the sum is 18.
The square root of 73431 is about 270.9815491874.
The cubic root of 73431 is about 41.8754815419.
The spelling of 73431 in words is "seventy-three thousand, four hundred thirty-one".