243442145541 has 16 divisors (see below), whose sum is σ = 371262818304. Its totient is φ = 138996038064.

The previous prime is 243442145521. The next prime is 243442145579. The reversal of 243442145541 is 145541244342.

It is not a de Polignac number, because 243442145541 - 2⁵ = 243442145509 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 243442145541.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243442145521) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4713681 + ... + 4765046.

It is an arithmetic number, because the mean of its divisors is an integer number (23203926144).

Almost surely, 2^243442145541 is an apocalyptic number.

243442145541 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

243442145541 is a deficient number, since it is larger than the sum of its proper divisors (127820672763).

243442145541 is a wasteful number, since it uses less digits than its factorization.

243442145541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9479960.

The product of its digits is 307200, while the sum is 39.

Adding to 243442145541 its reverse (145541244342), we get a palindrome (388983389883).

The spelling of 243442145541 in words is "two hundred forty-three billion, four hundred forty-two million, one hundred forty-five thousand, five hundred forty-one".