16432431 has 8 divisors (see below), whose sum is σ = 22444464. Its totient is φ = 10687680.

The previous prime is 16432399. The next prime is 16432439. The reversal of 16432431 is 13423461.

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

It is not a de Polignac number, because 16432431 - 2⁵ = 16432399 is a prime.

It is a super-2 number, since 2×16432431² = 540049577139522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16432439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 66676 + ... + 66921.

It is an arithmetic number, because the mean of its divisors is an integer number (2805558).

Almost surely, 2^16432431 is an apocalyptic number.

16432431 is a deficient number, since it is larger than the sum of its proper divisors (6012033).

16432431 is a wasteful number, since it uses less digits than its factorization.

16432431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133641.

The product of its digits is 1728, while the sum is 24.

The square root of 16432431 is about 4053.6935009939. The cubic root of 16432431 is about 254.2341806613.

Adding to 16432431 its reverse (13423461), we get a palindrome (29855892).

The spelling of 16432431 in words is "sixteen million, four hundred thirty-two thousand, four hundred thirty-one".