51320421441 has 6 divisors (see below), whose sum is σ = 74129497650. Its totient is φ = 34213614288.

The previous prime is 51320421419. The next prime is 51320421469. The reversal of 51320421441 is 14412402315.

51320421441 is a `hidden beast` number, since 5 + 13 + 204 + 2 + 1 + 441 = 666.

It can be written as a sum of positive squares in only one way, i.e., 50263846416 + 1056575025 = 224196^2 + 32505^2 .

It is not a de Polignac number, because 51320421441 - 2⁶ = 51320421377 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51320421401) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2851134516 + ... + 2851134533.

It is an arithmetic number, because the mean of its divisors is an integer number (12354916275).

Almost surely, 2^51320421441 is an apocalyptic number.

It is an amenable number.

51320421441 is a deficient number, since it is larger than the sum of its proper divisors (22809076209).

51320421441 is a wasteful number, since it uses less digits than its factorization.

51320421441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5702269055 (or 5702269052 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 27.

Adding to 51320421441 its reverse (14412402315), we get a palindrome (65732823756).

The spelling of 51320421441 in words is "fifty-one billion, three hundred twenty million, four hundred twenty-one thousand, four hundred forty-one".