51451432441 has 2 divisors, whose sum is σ = 51451432442. Its totient is φ = 51451432440.

The previous prime is 51451432427. The next prime is 51451432447. The reversal of 51451432441 is 14423415415.

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., 39562801216 + 11888631225 = 198904^2 + 109035^2 .

It is a cyclic number.

It is not a de Polignac number, because 51451432441 - 2⁹ = 51451431929 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 51451432397 and 51451432406.

It is not a weakly prime, because it can be changed into another prime (51451432447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25725716220 + 25725716221.

It is an arithmetic number, because the mean of its divisors is an integer number (25725716221).

Almost surely, 2^51451432441 is an apocalyptic number.

It is an amenable number.

51451432441 is a deficient number, since it is larger than the sum of its proper divisors (1).

51451432441 is an equidigital number, since it uses as much as digits as its factorization.

51451432441 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 38400, while the sum is 34.

Adding to 51451432441 its reverse (14423415415), we get a palindrome (65874847856).

The spelling of 51451432441 in words is "fifty-one billion, four hundred fifty-one million, four hundred thirty-two thousand, four hundred forty-one".