8140431 has 8 divisors (see below), whose sum is σ = 11688880. Its totient is φ = 5009472.

The previous prime is 8140421. The next prime is 8140439. The reversal of 8140431 is 1340418.

8140431 = T₃₁₃ + T₃₁₄ + ... + T₄₂₉.

8140431 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 8140431 - 2⁹ = 8139919 is a prime.

It is a super-2 number, since 2×8140431² = 132533233731522, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 8140398 and 8140407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8140439) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 104326 + ... + 104403.

It is an arithmetic number, because the mean of its divisors is an integer number (1461110).

Almost surely, 2^8140431 is an apocalyptic number.

8140431 is a deficient number, since it is larger than the sum of its proper divisors (3548449).

8140431 is a wasteful number, since it uses less digits than its factorization.

8140431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 208745.

The product of its (nonzero) digits is 384, while the sum is 21.

The square root of 8140431 is about 2853.1440552485. The cubic root of 8140431 is about 201.1634768170.

Adding to 8140431 its reverse (1340418), we get a palindrome (9480849).

The spelling of 8140431 in words is "eight million, one hundred forty thousand, four hundred thirty-one".