216051224 has 16 divisors (see below), whose sum is σ = 406170600. Its totient is φ = 107739072.

The previous prime is 216051217. The next prime is 216051229. The reversal of 216051224 is 422150612.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 216051224.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216051229) 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, 32597 + ... + 38660.

Almost surely, 2^216051224 is an apocalyptic number.

It is an amenable number.

216051224 is a deficient number, since it is larger than the sum of its proper divisors (190119376).

216051224 is a wasteful number, since it uses less digits than its factorization.

216051224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71642 (or 71638 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 216051224 is about 14698.6810292625. The cubic root of 216051224 is about 600.0474258808.

The spelling of 216051224 in words is "two hundred sixteen million, fifty-one thousand, two hundred twenty-four".