51021232433 has 2 divisors, whose sum is σ = 51021232434. Its totient is φ = 51021232432.

The previous prime is 51021232387. The next prime is 51021232441. The reversal of 51021232433 is 33423212015.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 45810125089 + 5211107344 = 214033^2 + 72188^2 .

It is a cyclic number.

It is not a de Polignac number, because 51021232433 - 2¹² = 51021228337 is a prime.

It is a super-2 number, since 2×51021232433² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (51021232453) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25510616216 + 25510616217.

It is an arithmetic number, because the mean of its divisors is an integer number (25510616217).

Almost surely, 2^51021232433 is an apocalyptic number.

It is an amenable number.

51021232433 is a deficient number, since it is larger than the sum of its proper divisors (1).

51021232433 is an equidigital number, since it uses as much as digits as its factorization.

51021232433 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 26.

Adding to 51021232433 its reverse (33423212015), we get a palindrome (84444444448).

The spelling of 51021232433 in words is "fifty-one billion, twenty-one million, two hundred thirty-two thousand, four hundred thirty-three".