243215023 has 8 divisors (see below), whose sum is σ = 250472288. Its totient is φ = 235993824.

The previous prime is 243215003. The next prime is 243215053. The reversal of 243215023 is 320512342.

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

It is a cyclic number.

It is not a de Polignac number, because 243215023 - 2²¹ = 241117871 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 243214985 and 243215003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243215003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4990 + ... + 22612.

It is an arithmetic number, because the mean of its divisors is an integer number (31309036).

Almost surely, 2^243215023 is an apocalyptic number.

243215023 is a deficient number, since it is larger than the sum of its proper divisors (7257265).

243215023 is a wasteful number, since it uses less digits than its factorization.

243215023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18033.

The product of its (nonzero) digits is 1440, while the sum is 22.

The square root of 243215023 is about 15595.3526090307. The cubic root of 243215023 is about 624.2091526789.

Adding to 243215023 its reverse (320512342), we get a palindrome (563727365).

The spelling of 243215023 in words is "two hundred forty-three million, two hundred fifteen thousand, twenty-three".