216724052 has 6 divisors (see below), whose sum is σ = 379267098. Its totient is φ = 108362024.

The previous prime is 216724031. The next prime is 216724061. The reversal of 216724052 is 250427612.

It is a happy number.

216724052 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 137264656 + 79459396 = 11716^2 + 8914^2 .

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, 27090503 + ... + 27090510.

It is an arithmetic number, because the mean of its divisors is an integer number (63211183).

Almost surely, 2^216724052 is an apocalyptic number.

It is an amenable number.

216724052 is a deficient number, since it is larger than the sum of its proper divisors (162543046).

216724052 is a wasteful number, since it uses less digits than its factorization.

216724052 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54181017 (or 54181015 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 29.

The square root of 216724052 is about 14721.5505976782. The cubic root of 216724052 is about 600.6696708088.

The spelling of 216724052 in words is "two hundred sixteen million, seven hundred twenty-four thousand, fifty-two".