51130415021 has 8 divisors (see below), whose sum is σ = 58436262720. Its totient is φ = 43824943008.

The previous prime is 51130414847. The next prime is 51130415027. The reversal of 51130415021 is 12051403115.

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

It is a de Polignac number, because none of the positive numbers 2^k-51130415021 is a prime.

It is a super-2 number, since 2×51130415021² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51130415027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 318425 + ... + 451281.

It is an arithmetic number, because the mean of its divisors is an integer number (7304532840).

Almost surely, 2^51130415021 is an apocalyptic number.

It is an amenable number.

51130415021 is a deficient number, since it is larger than the sum of its proper divisors (7305847699).

51130415021 is a wasteful number, since it uses less digits than its factorization.

51130415021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 187843.

The product of its (nonzero) digits is 600, while the sum is 23.

Adding to 51130415021 its reverse (12051403115), we get a palindrome (63181818136).

The spelling of 51130415021 in words is "fifty-one billion, one hundred thirty million, four hundred fifteen thousand, twenty-one".