51522881 has 2 divisors, whose sum is σ = 51522882. Its totient is φ = 51522880.

The previous prime is 51522853. The next prime is 51522893. The reversal of 51522881 is 18822515.

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., 50908225 + 614656 = 7135^2 + 784^2 .

It is a cyclic number.

It is not a de Polignac number, because 51522881 - 2⁶ = 51522817 is a prime.

It is a super-2 number, since 2×51522881² = 5309214533080322, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (51522841) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25761440 + 25761441.

It is an arithmetic number, because the mean of its divisors is an integer number (25761441).

Almost surely, 2^51522881 is an apocalyptic number.

It is an amenable number.

51522881 is a deficient number, since it is larger than the sum of its proper divisors (1).

51522881 is an equidigital number, since it uses as much as digits as its factorization.

51522881 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6400, while the sum is 32.

The square root of 51522881 is about 7177.9440649813. The cubic root of 51522881 is about 372.1060345398.

The spelling of 51522881 in words is "fifty-one million, five hundred twenty-two thousand, eight hundred eighty-one".