216127913 has 2 divisors, whose sum is σ = 216127914. Its totient is φ = 216127912.

The previous prime is 216127859. The next prime is 216127921. The reversal of 216127913 is 319721612.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 213072409 + 3055504 = 14597^2 + 1748^2 .

It is a cyclic number.

It is not a de Polignac number, because 216127913 - 2⁸ = 216127657 is a prime.

It is a super-4 number, since 4×216127913⁴ (a number of 34 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a self number, because there is not a number n which added to its sum of digits gives 216127913.

It is not a weakly prime, because it can be changed into another prime (216127943) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108063956 + 108063957.

It is an arithmetic number, because the mean of its divisors is an integer number (108063957).

Almost surely, 2^216127913 is an apocalyptic number.

It is an amenable number.

216127913 is a deficient number, since it is larger than the sum of its proper divisors (1).

216127913 is an equidigital number, since it uses as much as digits as its factorization.

216127913 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4536, while the sum is 32.

The square root of 216127913 is about 14701.2895012648. The cubic root of 216127913 is about 600.1184145914.

The spelling of 216127913 in words is "two hundred sixteen million, one hundred twenty-seven thousand, nine hundred thirteen".