16216407 has 6 divisors (see below), whose sum is σ = 23423712. Its totient is φ = 10810932.

The previous prime is 16216399. The next prime is 16216427. The reversal of 16216407 is 70461261.

16216407 is a `hidden beast` number, since 16 + 2 + 1 + 640 + 7 = 666.

It is not a de Polignac number, because 16216407 - 2³ = 16216399 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16216427) 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, 900903 + ... + 900920.

It is an arithmetic number, because the mean of its divisors is an integer number (3903952).

Almost surely, 2^16216407 is an apocalyptic number.

16216407 is a deficient number, since it is larger than the sum of its proper divisors (7207305).

16216407 is a wasteful number, since it uses less digits than its factorization.

16216407 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1801829 (or 1801826 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 27.

The square root of 16216407 is about 4026.9600196674. The cubic root of 16216407 is about 253.1151917553.

Adding to 16216407 its reverse (70461261), we get a palindrome (86677668).

The spelling of 16216407 in words is "sixteen million, two hundred sixteen thousand, four hundred seven".