216376977 has 16 divisors (see below), whose sum is σ = 290949120. Its totient is φ = 143034192.

The previous prime is 216376957. The next prime is 216376981. The reversal of 216376977 is 779673612.

216376977 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 216376977 - 2¹² = 216372881 is a prime.

It is not an unprimeable number, because it can be changed into a prime (216376907) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 219628 + ... + 220610.

It is an arithmetic number, because the mean of its divisors is an integer number (18184320).

Almost surely, 2^216376977 is an apocalyptic number.

It is an amenable number.

216376977 is a deficient number, since it is larger than the sum of its proper divisors (74572143).

216376977 is a wasteful number, since it uses less digits than its factorization.

216376977 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1532.

The product of its digits is 666792, while the sum is 48.

The square root of 216376977 is about 14709.7578837994. The cubic root of 216376977 is about 600.3488499114.

The spelling of 216376977 in words is "two hundred sixteen million, three hundred seventy-six thousand, nine hundred seventy-seven".