243520023 has 8 divisors (see below), whose sum is σ = 325399536. Its totient is φ = 161993600.

The previous prime is 243519923. The next prime is 243520027. The reversal of 243520023 is 320025342.

243520023 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 243520023 - 2¹³ = 243511831 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243520027) 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, 86658 + ... + 89423.

It is an arithmetic number, because the mean of its divisors is an integer number (40674942).

Almost surely, 2^243520023 is an apocalyptic number.

243520023 is a deficient number, since it is larger than the sum of its proper divisors (81879513).

243520023 is a wasteful number, since it uses less digits than its factorization.

243520023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 176545.

The product of its (nonzero) digits is 1440, while the sum is 21.

The square root of 243520023 is about 15605.1280994422. The cubic root of 243520023 is about 624.4699702633.

Adding to 243520023 its reverse (320025342), we get a palindrome (563545365).

The spelling of 243520023 in words is "two hundred forty-three million, five hundred twenty thousand, twenty-three".