216871941 has 64 divisors (see below), whose sum is σ = 364041216. Its totient is φ = 112819200.

The previous prime is 216871937. The next prime is 216871951. The reversal of 216871941 is 149178612.

It is not a de Polignac number, because 216871941 - 2² = 216871937 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a self number, because there is not a number n which added to its sum of digits gives 216871941.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216871951) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 955270 + ... + 955496.

It is an arithmetic number, because the mean of its divisors is an integer number (5688144).

Almost surely, 2^216871941 is an apocalyptic number.

It is an amenable number.

216871941 is a deficient number, since it is larger than the sum of its proper divisors (147169275).

216871941 is a wasteful number, since it uses less digits than its factorization.

216871941 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 402.

The product of its digits is 24192, while the sum is 39.

The square root of 216871941 is about 14726.5726155138. The cubic root of 216871941 is about 600.8062688434.

The spelling of 216871941 in words is "two hundred sixteen million, eight hundred seventy-one thousand, nine hundred forty-one".