2016059621 has 2 divisors, whose sum is σ = 2016059622. Its totient is φ = 2016059620.

The previous prime is 2016059599. The next prime is 2016059623. The reversal of 2016059621 is 1269506102.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1998537025 + 17522596 = 44705^2 + 4186^2 .

It is a cyclic number.

It is not a de Polignac number, because 2016059621 - 2⁶ = 2016059557 is a prime.

It is a Sophie Germain prime.

Together with 2016059623, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2016059623) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1008029810 + 1008029811.

It is an arithmetic number, because the mean of its divisors is an integer number (1008029811).

Almost surely, 2^2016059621 is an apocalyptic number.

It is an amenable number.

2016059621 is a deficient number, since it is larger than the sum of its proper divisors (1).

2016059621 is an equidigital number, since it uses as much as digits as its factorization.

2016059621 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6480, while the sum is 32.

The square root of 2016059621 is about 44900.5525689829. The cubic root of 2016059621 is about 1263.2843727047.

The spelling of 2016059621 in words is "two billion, sixteen million, fifty-nine thousand, six hundred twenty-one".