51109441 has 2 divisors, whose sum is σ = 51109442. Its totient is φ = 51109440.

The previous prime is 51109439. The next prime is 51109447. The reversal of 51109441 is 14490115.

51109441 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 48233025 + 2876416 = 6945^2 + 1696^2 .

It is a cyclic number.

It is not a de Polignac number, because 51109441 - 2¹ = 51109439 is a prime.

It is a super-2 number, since 2×51109441² = 5224349918664962, which contains 22 as substring.

Together with 51109439, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (51109447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25554720 + 25554721.

It is an arithmetic number, because the mean of its divisors is an integer number (25554721).

Almost surely, 2^51109441 is an apocalyptic number.

It is an amenable number.

51109441 is a deficient number, since it is larger than the sum of its proper divisors (1).

51109441 is an equidigital number, since it uses as much as digits as its factorization.

51109441 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 720, while the sum is 25.

The square root of 51109441 is about 7149.0867248901. The cubic root of 51109441 is about 371.1080516326.

Adding to 51109441 its reverse (14490115), we get a palindrome (65599556).

The spelling of 51109441 in words is "fifty-one million, one hundred nine thousand, four hundred forty-one".