243143172 has 18 divisors (see below), whose sum is σ = 614611998. Its totient is φ = 81047712.

The previous prime is 243143111. The next prime is 243143203. The reversal of 243143172 is 271341342.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 239816196 + 3326976 = 15486^2 + 1824^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3376953 + ... + 3377024.

It is an arithmetic number, because the mean of its divisors is an integer number (34145111).

Almost surely, 2^243143172 is an apocalyptic number.

It is an amenable number.

243143172 is an abundant number, since it is smaller than the sum of its proper divisors (371468826).

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

243143172 is a wasteful number, since it uses less digits than its factorization.

243143172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6753987 (or 6753982 counting only the distinct ones).

The product of its digits is 4032, while the sum is 27.

The square root of 243143172 is about 15593.0488359397. The cubic root of 243143172 is about 624.1476783114.

The spelling of 243143172 in words is "two hundred forty-three million, one hundred forty-three thousand, one hundred seventy-two".