243547236 has 105 divisors (see below), whose sum is σ = 678957391. Its totient is φ = 76406976.

The previous prime is 243547223. The next prime is 243547247. The reversal of 243547236 is 632745342.

The square root of 243547236 is 15606.

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

It can be written as a sum of positive squares in 2 ways, for example, as 75585636 + 167961600 = 8694^2 + 12960^2 .

It is a super-3 number, since 3×243547236³ (a number of 26 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a Duffinian number.

Its product of digits (120960) is a multiple of the sum of its prime factors (90).

It is a self number, because there is not a number n which added to its sum of digits gives 243547236.

It is an unprimeable number.

It is a polite number, since it can be written in 34 ways as a sum of consecutive naturals, for example, 14326300 + ... + 14326316.

Almost surely, 2^243547236 is an apocalyptic number.

243547236 is the 15606-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 243547236

243547236 is an abundant number, since it is smaller than the sum of its proper divisors (435410155).

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

243547236 is an frugal number, since it uses more digits than its factorization.

243547236 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90 (or 22 counting only the distinct ones).

The product of its digits is 120960, while the sum is 36.

The cubic root of 243547236 is about 624.4932305934.

Multiplying 243547236 by its sum of digits (36), we get a 4-th power (8767700496 = 306⁴).

243547236 divided by its sum of digits (36) gives a 4-th power (6765201 = 51⁴).

The spelling of 243547236 in words is "two hundred forty-three million, five hundred forty-seven thousand, two hundred thirty-six".