51211644204401 has 8 divisors (see below), whose sum is σ = 52977750179880. Its totient is φ = 49445550709632.

The previous prime is 51211644204323. The next prime is 51211644204437. The reversal of 51211644204401 is 10440244611215.

It can be written as a sum of positive squares in 4 ways, for example, as 14865805584400 + 36345838620001 = 3855620^2 + 6028751^2 .

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 51211644204401 - 2³⁰ = 51210570462577 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51211644804401) 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, 5645261 + ... + 11588453.

It is an arithmetic number, because the mean of its divisors is an integer number (6622218772485).

Almost surely, 2^{51211644204401} is an apocalyptic number.

It is an amenable number.

51211644204401 is a deficient number, since it is larger than the sum of its proper divisors (1766105975479).

51211644204401 is a wasteful number, since it uses less digits than its factorization.

51211644204401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6240355.

The product of its (nonzero) digits is 30720, while the sum is 35.

Adding to 51211644204401 its reverse (10440244611215), we get a palindrome (61651888815616).

The spelling of 51211644204401 in words is "fifty-one trillion, two hundred eleven billion, six hundred forty-four million, two hundred four thousand, four hundred one".