243725051405 has 16 divisors (see below), whose sum is σ = 322155909504. Its totient is φ = 175533660480.

The previous prime is 243725051363. The next prime is 243725051431. The reversal of 243725051405 is 504150527342.

243725051405 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 243725051405 - 2⁶ = 243725051341 is a prime.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 21505814 + ... + 21517143.

It is an arithmetic number, because the mean of its divisors is an integer number (20134744344).

Almost surely, 2^243725051405 is an apocalyptic number.

It is an amenable number.

243725051405 is a deficient number, since it is larger than the sum of its proper divisors (78430858099).

243725051405 is a wasteful number, since it uses less digits than its factorization.

243725051405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43023076.

The product of its (nonzero) digits is 168000, while the sum is 38.

Adding to 243725051405 its reverse (504150527342), we get a palindrome (747875578747).

The spelling of 243725051405 in words is "two hundred forty-three billion, seven hundred twenty-five million, fifty-one thousand, four hundred five".