216083977 has 4 divisors (see below), whose sum is σ = 216118276. Its totient is φ = 216049680.

The previous prime is 216083971. The next prime is 216083983. The reversal of 216083977 is 779380612.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (216083971) and next prime (216083983).

It can be written as a sum of positive squares in 2 ways, for example, as 176783616 + 39300361 = 13296^2 + 6269^2 .

It is a cyclic number.

It is not a de Polignac number, because 216083977 - 2³ = 216083969 is a prime.

It is a super-2 number, since 2×216083977² = 93384570232273058, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (216083971) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4674 + ... + 21307.

It is an arithmetic number, because the mean of its divisors is an integer number (54029569).

Almost surely, 2^216083977 is an apocalyptic number.

It is an amenable number.

216083977 is a deficient number, since it is larger than the sum of its proper divisors (34299).

216083977 is an equidigital number, since it uses as much as digits as its factorization.

216083977 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34298.

The product of its (nonzero) digits is 127008, while the sum is 43.

The square root of 216083977 is about 14699.7951346269. The cubic root of 216083977 is about 600.0777464069.

The spelling of 216083977 in words is "two hundred sixteen million, eighty-three thousand, nine hundred seventy-seven".