51234231533 has 2 divisors, whose sum is σ = 51234231534. Its totient is φ = 51234231532.

The previous prime is 51234231439. The next prime is 51234231539. The reversal of 51234231533 is 33513243215.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 46827661609 + 4406569924 = 216397^2 + 66382^2 .

It is a cyclic number.

It is not a de Polignac number, because 51234231533 - 2¹² = 51234227437 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 51234231533.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51234231539) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25617115766 + 25617115767.

It is an arithmetic number, because the mean of its divisors is an integer number (25617115767).

Almost surely, 2^51234231533 is an apocalyptic number.

It is an amenable number.

51234231533 is a deficient number, since it is larger than the sum of its proper divisors (1).

51234231533 is an equidigital number, since it uses as much as digits as its factorization.

51234231533 is an evil number, because the sum of its binary digits is even.

The product of its digits is 32400, while the sum is 32.

Adding to 51234231533 its reverse (33513243215), we get a palindrome (84747474748).

The spelling of 51234231533 in words is "fifty-one billion, two hundred thirty-four million, two hundred thirty-one thousand, five hundred thirty-three".