51023134621 has 2 divisors, whose sum is σ = 51023134622. Its totient is φ = 51023134620.

The previous prime is 51023134619. The next prime is 51023134627. The reversal of 51023134621 is 12643132015.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 50872802500 + 150332121 = 225550^2 + 12261^2 .

It is a cyclic number.

It is not a de Polignac number, because 51023134621 - 2¹ = 51023134619 is a prime.

Together with 51023134619, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 51023134621.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51023134627) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25511567310 + 25511567311.

It is an arithmetic number, because the mean of its divisors is an integer number (25511567311).

Almost surely, 2^51023134621 is an apocalyptic number.

It is an amenable number.

51023134621 is a deficient number, since it is larger than the sum of its proper divisors (1).

51023134621 is an equidigital number, since it uses as much as digits as its factorization.

51023134621 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4320, while the sum is 28.

Adding to 51023134621 its reverse (12643132015), we get a palindrome (63666266636).

The spelling of 51023134621 in words is "fifty-one billion, twenty-three million, one hundred thirty-four thousand, six hundred twenty-one".