51233411420561 has 4 divisors (see below), whose sum is σ = 52073303411124. Its totient is φ = 50393519430000.

The previous prime is 51233411420549. The next prime is 51233411420579. The reversal of 51233411420561 is 16502411433215.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 22522086113536 + 28711325307025 = 4745744^2 + 5358295^2 .

It is a cyclic number.

It is not a de Polignac number, because 51233411420561 - 2⁶ = 51233411420497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51233411420501) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 419945995190 + ... + 419945995311.

It is an arithmetic number, because the mean of its divisors is an integer number (13018325852781).

Almost surely, 2^{51233411420561} is an apocalyptic number.

It is an amenable number.

51233411420561 is a deficient number, since it is larger than the sum of its proper divisors (839891990563).

51233411420561 is an equidigital number, since it uses as much as digits as its factorization.

51233411420561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 839891990562.

The product of its (nonzero) digits is 86400, while the sum is 38.

Adding to 51233411420561 its reverse (16502411433215), we get a palindrome (67735822853776).

The spelling of 51233411420561 in words is "fifty-one trillion, two hundred thirty-three billion, four hundred eleven million, four hundred twenty thousand, five hundred sixty-one".