2016215501 has 2 divisors, whose sum is σ = 2016215502. Its totient is φ = 2016215500.

The previous prime is 2016215497. The next prime is 2016215503. The reversal of 2016215501 is 1055126102.

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., 1667497225 + 348718276 = 40835^2 + 18674^2 .

It is a cyclic number.

It is not a de Polignac number, because 2016215501 - 2² = 2016215497 is a prime.

It is a Sophie Germain prime.

Together with 2016215503, 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 (2016215503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1008107750 + 1008107751.

It is an arithmetic number, because the mean of its divisors is an integer number (1008107751).

Almost surely, 2^2016215501 is an apocalyptic number.

It is an amenable number.

2016215501 is a deficient number, since it is larger than the sum of its proper divisors (1).

2016215501 is an equidigital number, since it uses as much as digits as its factorization.

2016215501 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 600, while the sum is 23.

The square root of 2016215501 is about 44902.2883715296. The cubic root of 2016215501 is about 1263.3169305535.

The spelling of 2016215501 in words is "two billion, sixteen million, two hundred fifteen thousand, five hundred one".