51104452421 has 8 divisors (see below), whose sum is σ = 56058326688. Its totient is φ = 46201914000.

The previous prime is 51104452417. The next prime is 51104452423. The reversal of 51104452421 is 12425440115.

It is a happy number.

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

It is not a de Polignac number, because 51104452421 - 2² = 51104452417 is a prime.

It is a super-2 number, since 2×51104452421² (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 (51104452423) 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, 12831875 + ... + 12835856.

It is an arithmetic number, because the mean of its divisors is an integer number (7007290836).

Almost surely, 2^51104452421 is an apocalyptic number.

It is an amenable number.

51104452421 is a deficient number, since it is larger than the sum of its proper divisors (4953874267).

51104452421 is a wasteful number, since it uses less digits than its factorization.

51104452421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25667923.

The product of its (nonzero) digits is 6400, while the sum is 29.

Adding to 51104452421 its reverse (12425440115), we get a palindrome (63529892536).

The spelling of 51104452421 in words is "fifty-one billion, one hundred four million, four hundred fifty-two thousand, four hundred twenty-one".