243447507216 has 45 divisors (see below), whose sum is σ = 681331469221. Its totient is φ = 81147195456.

The previous prime is 243447507187. The next prime is 243447507287. The reversal of 243447507216 is 612705744342.

The square root of 243447507216 is 493404.

It is a perfect power (a square), and thus also a powerful number.

243447507216 is a `hidden beast` number, since 24 + 344 + 75 + 0 + 7 + 216 = 666.

It can be written as a sum of positive squares in only one way, i.e., 167985219600 + 75462287616 = 409860^2 + 274704^2 .

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 5900290 + ... + 5941406.

Almost surely, 2^243447507216 is an apocalyptic number.

243447507216 is the 493404-th square number.

It is an amenable number.

243447507216 is an abundant number, since it is smaller than the sum of its proper divisors (437883962005).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

243447507216 is an frugal number, since it uses more digits than its factorization.

243447507216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82248 (or 41122 counting only the distinct ones).

The product of its (nonzero) digits is 1128960, while the sum is 45.

The spelling of 243447507216 in words is "two hundred forty-three billion, four hundred forty-seven million, five hundred seven thousand, two hundred sixteen".