216751412 has 6 divisors (see below), whose sum is σ = 379314978. Its totient is φ = 108375704.

The previous prime is 216751393. The next prime is 216751441. The reversal of 216751412 is 214157612.

It can be written as a sum of positive squares in only one way, i.e., 166823056 + 49928356 = 12916^2 + 7066^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27093923 + ... + 27093930.

It is an arithmetic number, because the mean of its divisors is an integer number (63219163).

Almost surely, 2^216751412 is an apocalyptic number.

It is an amenable number.

216751412 is a deficient number, since it is larger than the sum of its proper divisors (162563566).

216751412 is a wasteful number, since it uses less digits than its factorization.

216751412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54187857 (or 54187855 counting only the distinct ones).

The product of its digits is 3360, while the sum is 29.

The square root of 216751412 is about 14722.4798182915. The cubic root of 216751412 is about 600.6949466231.

The spelling of 216751412 in words is "two hundred sixteen million, seven hundred fifty-one thousand, four hundred twelve".