43121360053 has 4 divisors (see below), whose sum is σ = 43347126528. Its totient is φ = 42895593580.

The previous prime is 43121360039. The next prime is 43121360069. The reversal of 43121360053 is 35006312134.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 35006312134 = 2 ⋅17503156067.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-43121360053 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43121360033) 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 3 ways as a sum of consecutive naturals, for example, 112882951 + ... + 112883332.

It is an arithmetic number, because the mean of its divisors is an integer number (10836781632).

Almost surely, 2^43121360053 is an apocalyptic number.

It is an amenable number.

43121360053 is a deficient number, since it is larger than the sum of its proper divisors (225766475).

43121360053 is a wasteful number, since it uses less digits than its factorization.

43121360053 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 225766474.

The product of its (nonzero) digits is 6480, while the sum is 28.

Adding to 43121360053 its reverse (35006312134), we get a palindrome (78127672187).

The spelling of 43121360053 in words is "forty-three billion, one hundred twenty-one million, three hundred sixty thousand, fifty-three".