51143426635021 has 4 divisors (see below), whose sum is σ = 58449630440032. Its totient is φ = 43837222830012.

The previous prime is 51143426635013. The next prime is 51143426635051. The reversal of 51143426635021 is 12053662434115.

51143426635021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 51143426635021 - 2³ = 51143426635013 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 (51143426635051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3653101902495 + ... + 3653101902508.

It is an arithmetic number, because the mean of its divisors is an integer number (14612407610008).

Almost surely, 2^{51143426635021} is an apocalyptic number.

It is an amenable number.

51143426635021 is a deficient number, since it is larger than the sum of its proper divisors (7306203805011).

51143426635021 is an equidigital number, since it uses as much as digits as its factorization.

51143426635021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7306203805010.

The product of its (nonzero) digits is 518400, while the sum is 43.

The spelling of 51143426635021 in words is "fifty-one trillion, one hundred forty-three billion, four hundred twenty-six million, six hundred thirty-five thousand, twenty-one".