51210622455221 has 16 divisors (see below), whose sum is σ = 51432778737600. Its totient is φ = 50988855535488.

The previous prime is 51210622455203. The next prime is 51210622455241. The reversal of 51210622455221 is 12255422601215.

It is a cyclic number.

It is not a de Polignac number, because 51210622455221 - 2¹⁰ = 51210622454197 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 (51210622455241) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3839158370 + ... + 3839171708.

It is an arithmetic number, because the mean of its divisors is an integer number (3214548671100).

Almost surely, 2^{51210622455221} is an apocalyptic number.

It is an amenable number.

51210622455221 is a deficient number, since it is larger than the sum of its proper divisors (222156282379).

51210622455221 is a wasteful number, since it uses less digits than its factorization.

51210622455221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26708.

The product of its (nonzero) digits is 96000, while the sum is 38.

The spelling of 51210622455221 in words is "fifty-one trillion, two hundred ten billion, six hundred twenty-two million, four hundred fifty-five thousand, two hundred twenty-one".