2016511621 has 8 divisors (see below), whose sum is σ = 2036910240. Its totient is φ = 1996141968.

The previous prime is 2016511589. The next prime is 2016511633. The reversal of 2016511621 is 1261156102.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 2016511621 - 2⁵ = 2016511589 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 (2016511681) 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 7 ways as a sum of consecutive naturals, for example, 149655 + ... + 162571.

It is an arithmetic number, because the mean of its divisors is an integer number (254613780).

Almost surely, 2^2016511621 is an apocalyptic number.

It is an amenable number.

2016511621 is a deficient number, since it is larger than the sum of its proper divisors (20398619).

2016511621 is a wasteful number, since it uses less digits than its factorization.

2016511621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14483.

The product of its (nonzero) digits is 720, while the sum is 25.

The square root of 2016511621 is about 44905.5856325246. The cubic root of 2016511621 is about 1263.3787749837.

Adding to 2016511621 its reverse (1261156102), we get a palindrome (3277667723).

The spelling of 2016511621 in words is "two billion, sixteen million, five hundred eleven thousand, six hundred twenty-one".