51550104321 has 28 divisors (see below), whose sum is σ = 79783054080. Its totient is φ = 33258117240.

The previous prime is 51550104311. The next prime is 51550104323. The reversal of 51550104321 is 12340105515.

51550104321 is a `hidden beast` number, since 5 + 1 + 550 + 104 + 3 + 2 + 1 = 666.

It is not a de Polignac number, because 51550104321 - 2²⁷ = 51415886593 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (51550104323) by changing a digit.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 1117941 + ... + 1163138.

Almost surely, 2^51550104321 is an apocalyptic number.

It is an amenable number.

51550104321 is a deficient number, since it is larger than the sum of its proper divisors (28232949759).

51550104321 is an equidigital number, since it uses as much as digits as its factorization.

51550104321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2281128 (or 2281113 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 27.

Adding to 51550104321 its reverse (12340105515), we get a palindrome (63890209836).

The spelling of 51550104321 in words is "fifty-one billion, five hundred fifty million, one hundred four thousand, three hundred twenty-one".