201616447 has 4 divisors (see below), whose sum is σ = 213476256. Its totient is φ = 189756640.

The previous prime is 201616433. The next prime is 201616463. The reversal of 201616447 is 744616102.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 744616102 = 2 ⋅372308051.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-201616447 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201616487) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5929879 + ... + 5929912.

It is an arithmetic number, because the mean of its divisors is an integer number (53369064).

Almost surely, 2^201616447 is an apocalyptic number.

201616447 is a deficient number, since it is larger than the sum of its proper divisors (11859809).

201616447 is a wasteful number, since it uses less digits than its factorization.

201616447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11859808.

The product of its (nonzero) digits is 8064, while the sum is 31.

The square root of 201616447 is about 14199.1706447947. The cubic root of 201616447 is about 586.3748286279.

The spelling of 201616447 in words is "two hundred one million, six hundred sixteen thousand, four hundred forty-seven".