51567161 has 2 divisors, whose sum is σ = 51567162. Its totient is φ = 51567160.

The previous prime is 51567149. The next prime is 51567163. The reversal of 51567161 is 16176515.

51567161 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 can be written as a sum of positive squares in only one way, i.e., 51566761 + 400 = 7181^2 + 20^2 .

It is a cyclic number.

It is not a de Polignac number, because 51567161 - 2¹⁸ = 51305017 is a prime.

Together with 51567163, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (51567163) 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, 25783580 + 25783581.

It is an arithmetic number, because the mean of its divisors is an integer number (25783581).

Almost surely, 2^51567161 is an apocalyptic number.

It is an amenable number.

51567161 is a deficient number, since it is larger than the sum of its proper divisors (1).

51567161 is an equidigital number, since it uses as much as digits as its factorization.

51567161 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6300, while the sum is 32.

The square root of 51567161 is about 7181.0278512202. The cubic root of 51567161 is about 372.2126029675.

It can be divided in two parts, 515 and 67161, that added together give a palindrome (67676).

The spelling of 51567161 in words is "fifty-one million, five hundred sixty-seven thousand, one hundred sixty-one".