10509431 has 4 divisors (see below), whose sum is σ = 10524072. Its totient is φ = 10494792.

The previous prime is 10509371. The next prime is 10509461. The reversal of 10509431 is 13490501.

It is a happy number.

10509431 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13490501 = 307 ⋅43943.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10509431 is a prime.

It is a super-2 number, since 2×10509431² = 220896279887522, 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 = 10509397 and 10509406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10509461) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6185 + ... + 7698.

It is an arithmetic number, because the mean of its divisors is an integer number (2631018).

Almost surely, 2^10509431 is an apocalyptic number.

10509431 is a deficient number, since it is larger than the sum of its proper divisors (14641).

10509431 is an equidigital number, since it uses as much as digits as its factorization.

10509431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14640.

The product of its (nonzero) digits is 540, while the sum is 23.

The square root of 10509431 is about 3241.8252574746. The cubic root of 10509431 is about 219.0414980819.

Adding to 10509431 its reverse (13490501), we get a palindrome (23999932).

The spelling of 10509431 in words is "ten million, five hundred nine thousand, four hundred thirty-one".