51205533543101 has 4 divisors (see below), whose sum is σ = 58520609763552. Its totient is φ = 43890457322652.

The previous prime is 51205533543049. The next prime is 51205533543181. The reversal of 51205533543101 is 10134533550215.

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.

It is a cyclic number.

It is not a de Polignac number, because 51205533543101 - 2¹⁰ = 51205533542077 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 (51205533543181) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3657538110215 + ... + 3657538110228.

It is an arithmetic number, because the mean of its divisors is an integer number (14630152440888).

Almost surely, 2^{51205533543101} is an apocalyptic number.

It is an amenable number.

51205533543101 is a deficient number, since it is larger than the sum of its proper divisors (7315076220451).

51205533543101 is an equidigital number, since it uses as much as digits as its factorization.

51205533543101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7315076220450.

The product of its (nonzero) digits is 135000, while the sum is 38.

The spelling of 51205533543101 in words is "fifty-one trillion, two hundred five billion, five hundred thirty-three million, five hundred forty-three thousand, one hundred one".