51449171 has 2 divisors, whose sum is σ = 51449172. Its totient is φ = 51449170.

The previous prime is 51449143. The next prime is 51449197. The reversal of 51449171 is 17194415.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51449171 - 2¹⁰ = 51448147 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (51449141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25724585 + 25724586.

It is an arithmetic number, because the mean of its divisors is an integer number (25724586).

Almost surely, 2^51449171 is an apocalyptic number.

51449171 is a deficient number, since it is larger than the sum of its proper divisors (1).

51449171 is an equidigital number, since it uses as much as digits as its factorization.

51449171 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5040, while the sum is 32.

The square root of 51449171 is about 7172.8077487132. The cubic root of 51449171 is about 371.9285015978.

The spelling of 51449171 in words is "fifty-one million, four hundred forty-nine thousand, one hundred seventy-one".