51212205055 has 8 divisors (see below), whose sum is σ = 67041432144. Its totient is φ = 37245240000.

The previous prime is 51212205049. The next prime is 51212205097. The reversal of 51212205055 is 55050221215.

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

It is not a de Polignac number, because 51212205055 - 2¹³ = 51212196863 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 465565446 + ... + 465565555.

It is an arithmetic number, because the mean of its divisors is an integer number (8380179018).

Almost surely, 2^51212205055 is an apocalyptic number.

51212205055 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

51212205055 is a deficient number, since it is larger than the sum of its proper divisors (15829227089).

51212205055 is a wasteful number, since it uses less digits than its factorization.

51212205055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 931131017.

The product of its (nonzero) digits is 5000, while the sum is 28.

The spelling of 51212205055 in words is "fifty-one billion, two hundred twelve million, two hundred five thousand, fifty-five".