51321413551 has 8 divisors (see below), whose sum is σ = 54095657600. Its totient is φ = 48554481240.

The previous prime is 51321413527. The next prime is 51321413569. The reversal of 51321413551 is 15531412315.

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 51321413551 - 2¹⁷ = 51321282479 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51321413051) 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, 1813515 + ... + 1841596.

It is an arithmetic number, because the mean of its divisors is an integer number (6761957200).

Almost surely, 2^51321413551 is an apocalyptic number.

51321413551 is a deficient number, since it is larger than the sum of its proper divisors (2774244049).

51321413551 is a wasteful number, since it uses less digits than its factorization.

51321413551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3655869.

The product of its digits is 9000, while the sum is 31.

Adding to 51321413551 its reverse (15531412315), we get a palindrome (66852825866).

The spelling of 51321413551 in words is "fifty-one billion, three hundred twenty-one million, four hundred thirteen thousand, five hundred fifty-one".