216219877 has 4 divisors (see below), whose sum is σ = 216548640. Its totient is φ = 215891116.

The previous prime is 216219869. The next prime is 216219901. The reversal of 216219877 is 778912612.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 216219877 - 2³ = 216219869 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 (216219827) 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 3 ways as a sum of consecutive naturals, for example, 163393 + ... + 164710.

It is an arithmetic number, because the mean of its divisors is an integer number (54137160).

Almost surely, 2^216219877 is an apocalyptic number.

It is an amenable number.

216219877 is a deficient number, since it is larger than the sum of its proper divisors (328763).

216219877 is an equidigital number, since it uses as much as digits as its factorization.

216219877 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 328762.

The product of its digits is 84672, while the sum is 43.

The square root of 216219877 is about 14704.4169214559. The cubic root of 216219877 is about 600.2035207725.

The spelling of 216219877 in words is "two hundred sixteen million, two hundred nineteen thousand, eight hundred seventy-seven".