43121640053 has 16 divisors (see below), whose sum is σ = 43993497600. Its totient is φ = 42257905200.

The previous prime is 43121640007. The next prime is 43121640097. The reversal of 43121640053 is 35004612134.

It is a cyclic number.

It is not a de Polignac number, because 43121640053 - 2¹⁸ = 43121377909 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 43121639998 and 43121640025.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43129640053) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8983148 + ... + 8987946.

It is an arithmetic number, because the mean of its divisors is an integer number (2749593600).

Almost surely, 2^43121640053 is an apocalyptic number.

It is an amenable number.

43121640053 is a deficient number, since it is larger than the sum of its proper divisors (871857547).

43121640053 is a wasteful number, since it uses less digits than its factorization.

43121640053 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5608.

The product of its (nonzero) digits is 8640, while the sum is 29.

The spelling of 43121640053 in words is "forty-three billion, one hundred twenty-one million, six hundred forty thousand, fifty-three".