16290431 has 8 divisors (see below), whose sum is σ = 17139600. Its totient is φ = 15460480.

The previous prime is 16290427. The next prime is 16290433. The reversal of 16290431 is 13409261.

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

It is not a de Polignac number, because 16290431 - 2² = 16290427 is a prime.

It is a super-2 number, since 2×16290431² = 530756284331522, 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 16290431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16290433) 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, 3050 + ... + 6471.

It is an arithmetic number, because the mean of its divisors is an integer number (2142450).

Almost surely, 2^16290431 is an apocalyptic number.

16290431 is a deficient number, since it is larger than the sum of its proper divisors (849169).

16290431 is an equidigital number, since it uses as much as digits as its factorization.

16290431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9609.

The product of its (nonzero) digits is 1296, while the sum is 26.

The square root of 16290431 is about 4036.1406070651. The cubic root of 16290431 is about 253.4997438877.

Adding to 16290431 its reverse (13409261), we get a palindrome (29699692).

The spelling of 16290431 in words is "sixteen million, two hundred ninety thousand, four hundred thirty-one".