43431323350551 has 16 divisors (see below), whose sum is σ = 61314987859200. Its totient is φ = 27250947116928.

The previous prime is 43431323350549. The next prime is 43431323350577. The reversal of 43431323350551 is 15505332313434.

It is not a de Polignac number, because 43431323350551 - 2¹ = 43431323350549 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43431323350501) 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, 19990230 + ... + 22056108.

It is an arithmetic number, because the mean of its divisors is an integer number (3832186741200).

Almost surely, 2^{43431323350551} is an apocalyptic number.

43431323350551 is a deficient number, since it is larger than the sum of its proper divisors (17883664508649).

43431323350551 is a wasteful number, since it uses less digits than its factorization.

43431323350551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2478118.

The product of its (nonzero) digits is 972000, while the sum is 42.

Adding to 43431323350551 its reverse (15505332313434), we get a palindrome (58936655663985).

The spelling of 43431323350551 in words is "forty-three trillion, four hundred thirty-one billion, three hundred twenty-three million, three hundred fifty thousand, five hundred fifty-one".