243215690593 has 16 divisors (see below), whose sum is σ = 263573234496. Its totient is φ = 223532951040.

The previous prime is 243215690587. The next prime is 243215690621. The reversal of 243215690593 is 395096512342.

It is a happy number.

It is not a de Polignac number, because 243215690593 - 2²⁵ = 243182136161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (243215690503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3269533 + ... + 3343093.

It is an arithmetic number, because the mean of its divisors is an integer number (16473327156).

Almost surely, 2^243215690593 is an apocalyptic number.

It is an amenable number.

243215690593 is a deficient number, since it is larger than the sum of its proper divisors (20357543903).

243215690593 is a wasteful number, since it uses less digits than its factorization.

243215690593 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78144.

The product of its (nonzero) digits is 1749600, while the sum is 49.

The spelling of 243215690593 in words is "two hundred forty-three billion, two hundred fifteen million, six hundred ninety thousand, five hundred ninety-three".