51104340221 has 8 divisors (see below), whose sum is σ = 55753053600. Its totient is φ = 46456104240.

The previous prime is 51104340179. The next prime is 51104340341. The reversal of 51104340221 is 12204340115.

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 51104340221 - 2²² = 51100145917 is a prime.

It is a super-2 number, since 2×51104340221² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51104360221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 126515 + ... + 343823.

It is an arithmetic number, because the mean of its divisors is an integer number (6969131700).

Almost surely, 2^51104340221 is an apocalyptic number.

It is an amenable number.

51104340221 is a deficient number, since it is larger than the sum of its proper divisors (4648713379).

51104340221 is a wasteful number, since it uses less digits than its factorization.

51104340221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 238699.

The product of its (nonzero) digits is 960, while the sum is 23.

Adding to 51104340221 its reverse (12204340115), we get a palindrome (63308680336).

The spelling of 51104340221 in words is "fifty-one billion, one hundred four million, three hundred forty thousand, two hundred twenty-one".