243188745 has 8 divisors (see below), whose sum is σ = 389102016. Its totient is φ = 129700656.

The previous prime is 243188741. The next prime is 243188749. The reversal of 243188745 is 547881342.

243188745 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (243188741) and next prime (243188749).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 243188745 - 2² = 243188741 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 243188697 and 243188706.

It is not an unprimeable number, because it can be changed into a prime (243188741) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8106277 + ... + 8106306.

It is an arithmetic number, because the mean of its divisors is an integer number (48637752).

Almost surely, 2^243188745 is an apocalyptic number.

It is an amenable number.

243188745 is a deficient number, since it is larger than the sum of its proper divisors (145913271).

243188745 is a wasteful number, since it uses less digits than its factorization.

243188745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16212591.

The product of its digits is 215040, while the sum is 42.

The square root of 243188745 is about 15594.5100916957. The cubic root of 243188745 is about 624.1866711196.

The spelling of 243188745 in words is "two hundred forty-three million, one hundred eighty-eight thousand, seven hundred forty-five".