43542404251 has 16 divisors (see below), whose sum is σ = 44700304896. Its totient is φ = 42394748896.

The previous prime is 43542404201. The next prime is 43542404263. The reversal of 43542404251 is 15240424534.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-43542404251 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (43542404201) 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, 7613445 + ... + 7619161.

It is an arithmetic number, because the mean of its divisors is an integer number (2793769056).

Almost surely, 2^43542404251 is an apocalyptic number.

43542404251 is a deficient number, since it is larger than the sum of its proper divisors (1157900645).

43542404251 is a wasteful number, since it uses less digits than its factorization.

43542404251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6578.

The product of its (nonzero) digits is 76800, while the sum is 34.

Adding to 43542404251 its reverse (15240424534), we get a palindrome (58782828785).

The spelling of 43542404251 in words is "forty-three billion, five hundred forty-two million, four hundred four thousand, two hundred fifty-one".