51220706052205 has 8 divisors (see below), whose sum is σ = 61465005343512. Its totient is φ = 40976459454528.

The previous prime is 51220706052199. The next prime is 51220706052221. The reversal of 51220706052205 is 50225060702215.

It can be written as a sum of positive squares in 4 ways, for example, as 6142654919844 + 45078051132361 = 2478438^2 + 6714019^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 51220706052205 - 2¹⁵ = 51220706019437 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11002374 + ... + 14949703.

It is an arithmetic number, because the mean of its divisors is an integer number (7683125667939).

Almost surely, 2^{51220706052205} is an apocalyptic number.

It is an amenable number.

51220706052205 is a deficient number, since it is larger than the sum of its proper divisors (10244299291307).

51220706052205 is a wasteful number, since it uses less digits than its factorization.

51220706052205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26346815.

The product of its (nonzero) digits is 84000, while the sum is 37.

The spelling of 51220706052205 in words is "fifty-one trillion, two hundred twenty billion, seven hundred six million, fifty-two thousand, two hundred five".