16216403 has 12 divisors (see below), whose sum is σ = 19685520. Its totient is φ = 13294512.

The previous prime is 16216399. The next prime is 16216427. The reversal of 16216403 is 30461261.

It is a happy number.

It is not a de Polignac number, because 16216403 - 2² = 16216399 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16216433) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6068 + ... + 8321.

It is an arithmetic number, because the mean of its divisors is an integer number (1640460).

Almost surely, 2^16216403 is an apocalyptic number.

16216403 is a deficient number, since it is larger than the sum of its proper divisors (3469117).

16216403 is a wasteful number, since it uses less digits than its factorization.

16216403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14426 (or 14419 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 16216403 is about 4026.9595230149. The cubic root of 16216403 is about 253.1151709438.

Adding to 16216403 its reverse (30461261), we get a palindrome (46677664).

The spelling of 16216403 in words is "sixteen million, two hundred sixteen thousand, four hundred three".