16560431 has 4 divisors (see below), whose sum is σ = 17534592. Its totient is φ = 15586272.

The previous prime is 16560413. The next prime is 16560451. The reversal of 16560431 is 13406561.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13406561 = 7 ⋅1915223.

It is a cyclic number.

It is not a de Polignac number, because 16560431 - 2⁶ = 16560367 is a prime.

It is a super-2 number, since 2×16560431² = 548495749811522, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 16560431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16560451) 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, 487055 + ... + 487088.

It is an arithmetic number, because the mean of its divisors is an integer number (4383648).

Almost surely, 2^16560431 is an apocalyptic number.

16560431 is a deficient number, since it is larger than the sum of its proper divisors (974161).

16560431 is an equidigital number, since it uses as much as digits as its factorization.

16560431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 974160.

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 16560431 is about 4069.4509457665. The cubic root of 16560431 is about 254.8925909299.

Adding to 16560431 its reverse (13406561), we get a palindrome (29966992).

The spelling of 16560431 in words is "sixteen million, five hundred sixty thousand, four hundred thirty-one".