51310443621 has 8 divisors (see below), whose sum is σ = 68421538080. Its totient is φ = 34203155792.

The previous prime is 51310443601. The next prime is 51310443623. The reversal of 51310443621 is 12634401315.

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 51310443621 - 2²⁵ = 51276889189 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51310443623) 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, 920055 + ... + 974228.

It is an arithmetic number, because the mean of its divisors is an integer number (8552692260).

Almost surely, 2^51310443621 is an apocalyptic number.

It is an amenable number.

51310443621 is a deficient number, since it is larger than the sum of its proper divisors (17111094459).

51310443621 is a wasteful number, since it uses less digits than its factorization.

51310443621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1903315.

The product of its (nonzero) digits is 8640, while the sum is 30.

Adding to 51310443621 its reverse (12634401315), we get a palindrome (63944844936).

The spelling of 51310443621 in words is "fifty-one billion, three hundred ten million, four hundred forty-three thousand, six hundred twenty-one".