16213601 has 4 divisors (see below), whose sum is σ = 16519572. Its totient is φ = 15907632.

The previous prime is 16213567. The next prime is 16213607. The reversal of 16213601 is 10631261.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 11155600 + 5058001 = 3340^2 + 2249^2 .

It is a de Polignac number, because none of the positive numbers 2^k-16213601 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (16213607) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 152906 + ... + 153011.

It is an arithmetic number, because the mean of its divisors is an integer number (4129893).

Almost surely, 2^16213601 is an apocalyptic number.

It is an amenable number.

16213601 is a deficient number, since it is larger than the sum of its proper divisors (305971).

16213601 is an equidigital number, since it uses as much as digits as its factorization.

16213601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 305970.

The product of its (nonzero) digits is 216, while the sum is 20.

The square root of 16213601 is about 4026.6116028244. The cubic root of 16213601 is about 253.1005916819.

Adding to 16213601 its reverse (10631261), we get a palindrome (26844862).

The spelling of 16213601 in words is "sixteen million, two hundred thirteen thousand, six hundred one".