209241357243 has 8 divisors (see below), whose sum is σ = 279023032656. Its totient is φ = 139476960000.

The previous prime is 209241357187. The next prime is 209241357263. The reversal of 209241357243 is 342753142902.

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

It is not a de Polignac number, because 209241357243 - 2¹⁴ = 209241340859 is a prime.

It is a super-2 number, since 2×209241357243² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 209241357195 and 209241357204.

It is not an unprimeable number, because it can be changed into a prime (209241357263) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4291258 + ... + 4339743.

It is an arithmetic number, because the mean of its divisors is an integer number (34877879082).

Almost surely, 2^209241357243 is an apocalyptic number.

209241357243 is a deficient number, since it is larger than the sum of its proper divisors (69781675413).

209241357243 is an equidigital number, since it uses as much as digits as its factorization.

209241357243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8639085.

The product of its (nonzero) digits is 362880, while the sum is 42.

The spelling of 209241357243 in words is "two hundred nine billion, two hundred forty-one million, three hundred fifty-seven thousand, two hundred forty-three".