51333424342021 has 2 divisors, whose sum is σ = 51333424342022. Its totient is φ = 51333424342020.

The previous prime is 51333424342003. The next prime is 51333424342061. The reversal of 51333424342021 is 12024342433315.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 44926374965796 + 6407049376225 = 6702714^2 + 2531215^2 .

It is a cyclic number.

It is not a de Polignac number, because 51333424342021 - 2²¹ = 51333422244869 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51333424342061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25666712171010 + 25666712171011.

It is an arithmetic number, because the mean of its divisors is an integer number (25666712171011).

Almost surely, 2^{51333424342021} is an apocalyptic number.

It is an amenable number.

51333424342021 is a deficient number, since it is larger than the sum of its proper divisors (1).

51333424342021 is an equidigital number, since it uses as much as digits as its factorization.

51333424342021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 207360, while the sum is 37.

Adding to 51333424342021 its reverse (12024342433315), we get a palindrome (63357766775336).

The spelling of 51333424342021 in words is "fifty-one trillion, three hundred thirty-three billion, four hundred twenty-four million, three hundred forty-two thousand, twenty-one".