216751677 has 16 divisors (see below), whose sum is σ = 304527360. Its totient is φ = 136754352.

The previous prime is 216751657. The next prime is 216751687. The reversal of 216751677 is 776157612.

It is not a de Polignac number, because 216751677 - 2²⁷ = 82533949 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216751627) 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, 97108 + ... + 99314.

It is an arithmetic number, because the mean of its divisors is an integer number (19032960).

Almost surely, 2^216751677 is an apocalyptic number.

It is an amenable number.

216751677 is a deficient number, since it is larger than the sum of its proper divisors (87775683).

216751677 is a wasteful number, since it uses less digits than its factorization.

216751677 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3952.

The product of its digits is 123480, while the sum is 42.

The square root of 216751677 is about 14722.4888181313. The cubic root of 216751677 is about 600.6951914259.

The spelling of 216751677 in words is "two hundred sixteen million, seven hundred fifty-one thousand, six hundred seventy-seven".