243647252 has 6 divisors (see below), whose sum is σ = 426382698. Its totient is φ = 121823624.

The previous prime is 243647231. The next prime is 243647267. The reversal of 243647252 is 252746342.

It can be written as a sum of positive squares in only one way, i.e., 222725776 + 20921476 = 14924^2 + 4574^2 .

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, 30455903 + ... + 30455910.

It is an arithmetic number, because the mean of its divisors is an integer number (71063783).

Almost surely, 2^243647252 is an apocalyptic number.

It is an amenable number.

243647252 is a deficient number, since it is larger than the sum of its proper divisors (182735446).

243647252 is a wasteful number, since it uses less digits than its factorization.

243647252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60911817 (or 60911815 counting only the distinct ones).

The product of its digits is 80640, while the sum is 35.

The square root of 243647252 is about 15609.2040796448. The cubic root of 243647252 is about 624.5787044532.

The spelling of 243647252 in words is "two hundred forty-three million, six hundred forty-seven thousand, two hundred fifty-two".