51654569 has 2 divisors, whose sum is σ = 51654570. Its totient is φ = 51654568.

The previous prime is 51654541. The next prime is 51654599. The reversal of 51654569 is 96545615.

51654569 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 51652969 + 1600 = 7187^2 + 40^2 .

It is a cyclic number.

It is not a de Polignac number, because 51654569 - 2²⁰ = 50605993 is a prime.

It is a super-2 number, since 2×51654569² = 5336388997151522, 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 (51654529) 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, 25827284 + 25827285.

It is an arithmetic number, because the mean of its divisors is an integer number (25827285).

Almost surely, 2^51654569 is an apocalyptic number.

It is an amenable number.

51654569 is a deficient number, since it is larger than the sum of its proper divisors (1).

51654569 is an equidigital number, since it uses as much as digits as its factorization.

51654569 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 162000, while the sum is 41.

The square root of 51654569 is about 7187.1113112293. Note that the first 3 decimals coincide. The cubic root of 51654569 is about 372.4227883749.

The spelling of 51654569 in words is "fifty-one million, six hundred fifty-four thousand, five hundred sixty-nine".