51522161 has 2 divisors, whose sum is σ = 51522162. Its totient is φ = 51522160.

The previous prime is 51522137. The next prime is 51522173. The reversal of 51522161 is 16122515.

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., 25959025 + 25563136 = 5095^2 + 5056^2 .

It is a cyclic number.

It is not a de Polignac number, because 51522161 - 2¹⁸ = 51260017 is a prime.

It is not a weakly prime, because it can be changed into another prime (51522101) 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, 25761080 + 25761081.

It is an arithmetic number, because the mean of its divisors is an integer number (25761081).

Almost surely, 2^51522161 is an apocalyptic number.

It is an amenable number.

51522161 is a deficient number, since it is larger than the sum of its proper divisors (1).

51522161 is an equidigital number, since it uses as much as digits as its factorization.

51522161 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 600, while the sum is 23.

The square root of 51522161 is about 7177.8939111692. The cubic root of 51522161 is about 372.1043012154.

Adding to 51522161 its reverse (16122515), we get a palindrome (67644676).

The spelling of 51522161 in words is "fifty-one million, five hundred twenty-two thousand, one hundred sixty-one".