216751671 has 6 divisors (see below), whose sum is σ = 313085760. Its totient is φ = 144501108.

The previous prime is 216751657. The next prime is 216751687. The reversal of 216751671 is 176157612.

It is not a de Polignac number, because 216751671 - 2¹⁰ = 216750647 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216751651) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 12041751 + ... + 12041768.

It is an arithmetic number, because the mean of its divisors is an integer number (52180960).

Almost surely, 2^216751671 is an apocalyptic number.

216751671 is a deficient number, since it is larger than the sum of its proper divisors (96334089).

216751671 is a wasteful number, since it uses less digits than its factorization.

216751671 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24083525 (or 24083522 counting only the distinct ones).

The product of its digits is 17640, while the sum is 36.

The square root of 216751671 is about 14722.4886143614. The cubic root of 216751671 is about 600.6951858832.

The spelling of 216751671 in words is "two hundred sixteen million, seven hundred fifty-one thousand, six hundred seventy-one".