216412977 has 12 divisors (see below), whose sum is σ = 317167760. Its totient is φ = 131159160.

The previous prime is 216412961. The next prime is 216412979. The reversal of 216412977 is 779214612.

216412977 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 216412977 - 2⁴ = 216412961 is a prime.

It is a super-2 number, since 2×216412977² = 93669153228005058, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (216412979) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 297727 + ... + 298452.

Almost surely, 2^216412977 is an apocalyptic number.

It is an amenable number.

216412977 is a deficient number, since it is larger than the sum of its proper divisors (100754783).

216412977 is a wasteful number, since it uses less digits than its factorization.

216412977 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 596204 (or 596193 counting only the distinct ones).

The product of its digits is 42336, while the sum is 39.

The square root of 216412977 is about 14710.9815104227. The cubic root of 216412977 is about 600.3821426711.

The spelling of 216412977 in words is "two hundred sixteen million, four hundred twelve thousand, nine hundred seventy-seven".