51440911 has 2 divisors, whose sum is σ = 51440912. Its totient is φ = 51440910.

The previous prime is 51440801. The next prime is 51440927. The reversal of 51440911 is 11904415.

51440911 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51440911 - 2⁷ = 51440783 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51440941) 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, 25720455 + 25720456.

It is an arithmetic number, because the mean of its divisors is an integer number (25720456).

Almost surely, 2^51440911 is an apocalyptic number.

51440911 is a deficient number, since it is larger than the sum of its proper divisors (1).

51440911 is an equidigital number, since it uses as much as digits as its factorization.

51440911 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 51440911 is about 7172.2319399194. The cubic root of 51440911 is about 371.9085965551.

The spelling of 51440911 in words is "fifty-one million, four hundred forty thousand, nine hundred eleven".