16345431 has 6 divisors (see below), whose sum is σ = 23610080. Its totient is φ = 10896948.

The previous prime is 16345423. The next prime is 16345447. The reversal of 16345431 is 13454361.

It is not a de Polignac number, because 16345431 - 2³ = 16345423 is a prime.

It is a super-2 number, since 2×16345431² = 534346229151522, 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 = 16345395 and 16345404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16345451) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 908071 + ... + 908088.

Almost surely, 2^16345431 is an apocalyptic number.

16345431 is a deficient number, since it is larger than the sum of its proper divisors (7264649).

16345431 is a wasteful number, since it uses less digits than its factorization.

16345431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1816165 (or 1816162 counting only the distinct ones).

The product of its digits is 4320, while the sum is 27.

The square root of 16345431 is about 4042.9483053831. The cubic root of 16345431 is about 253.7847133142.

Adding to 16345431 its reverse (13454361), we get a palindrome (29799792).

The spelling of 16345431 in words is "sixteen million, three hundred forty-five thousand, four hundred thirty-one".