51104430520 has 192 divisors, whose sum is σ = 136615883040. Its totient is φ = 17054668800.

The previous prime is 51104430499. The next prime is 51104430563. The reversal of 51104430520 is 2503440115.

It is a happy number.

It is a super-2 number, since 2×51104430520² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 13457262 + ... + 13461058.

Almost surely, 2^51104430520 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51104430520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (68307941520).

51104430520 is an abundant number, since it is smaller than the sum of its proper divisors (85511452520).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51104430520 is a wasteful number, since it uses less digits than its factorization.

51104430520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4026 (or 4009 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 25.

Adding to 51104430520 its reverse (2503440115), we get a palindrome (53607870635).

The spelling of 51104430520 in words is "fifty-one billion, one hundred four million, four hundred thirty thousand, five hundred twenty".