51345060431621 has 8 divisors (see below), whose sum is σ = 56012867388000. Its totient is φ = 46677265840240.

The previous prime is 51345060431611. The next prime is 51345060431657. The reversal of 51345060431621 is 12613406054315.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51345060431621 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 (51345060431611) 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, 7032770 + ... + 12334908.

It is an arithmetic number, because the mean of its divisors is an integer number (7001608423500).

Almost surely, 2^{51345060431621} is an apocalyptic number.

It is an amenable number.

51345060431621 is a deficient number, since it is larger than the sum of its proper divisors (4667806956379).

51345060431621 is a wasteful number, since it uses less digits than its factorization.

51345060431621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6182499.

The product of its (nonzero) digits is 259200, while the sum is 41.

Adding to 51345060431621 its reverse (12613406054315), we get a palindrome (63958466485936).

The spelling of 51345060431621 in words is "fifty-one trillion, three hundred forty-five billion, sixty million, four hundred thirty-one thousand, six hundred twenty-one".