216115877 has 2 divisors, whose sum is σ = 216115878. Its totient is φ = 216115876.

The previous prime is 216115841. The next prime is 216115891. The reversal of 216115877 is 778511612.

It is a happy number.

216115877 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 118679236 + 97436641 = 10894^2 + 9871^2 .

It is a cyclic number.

It is not a de Polignac number, because 216115877 - 2⁶ = 216115813 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 216115877.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (216111877) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108057938 + 108057939.

It is an arithmetic number, because the mean of its divisors is an integer number (108057939).

Almost surely, 2^216115877 is an apocalyptic number.

It is an amenable number.

216115877 is a deficient number, since it is larger than the sum of its proper divisors (1).

216115877 is an equidigital number, since it uses as much as digits as its factorization.

216115877 is an evil number, because the sum of its binary digits is even.

The product of its digits is 23520, while the sum is 38.

The square root of 216115877 is about 14700.8801437193. The cubic root of 216115877 is about 600.1072743377.

The spelling of 216115877 in words is "two hundred sixteen million, one hundred fifteen thousand, eight hundred seventy-seven".