43451242551 has 12 divisors (see below), whose sum is σ = 63081501912. Its totient is φ = 28820450736.

The previous prime is 43451242529. The next prime is 43451242607. The reversal of 43451242551 is 15524215434.

43451242551 is a `hidden beast` number, since 4 + 34 + 51 + 24 + 2 + 551 = 666.

It is not a de Polignac number, because 43451242551 - 2¹⁵ = 43451209783 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43451242151) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 12251821 + ... + 12255366.

It is an arithmetic number, because the mean of its divisors is an integer number (5256791826).

Almost surely, 2^43451242551 is an apocalyptic number.

43451242551 is a deficient number, since it is larger than the sum of its proper divisors (19630259361).

43451242551 is a wasteful number, since it uses less digits than its factorization.

43451242551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24507390 (or 24507387 counting only the distinct ones).

The product of its digits is 96000, while the sum is 36.

Adding to 43451242551 its reverse (15524215434), we get a palindrome (58975457985).

The spelling of 43451242551 in words is "forty-three billion, four hundred fifty-one million, two hundred forty-two thousand, five hundred fifty-one".