55652561 has 2 divisors, whose sum is σ = 55652562. Its totient is φ = 55652560.

The previous prime is 55652507. The next prime is 55652563. The reversal of 55652561 is 16525655.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 55651600 + 961 = 7460^2 + 31^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55652561 is a prime.

It is a Sophie Germain prime.

Together with 55652563, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (55652563) 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, 27826280 + 27826281.

It is an arithmetic number, because the mean of its divisors is an integer number (27826281).

Almost surely, 2^55652561 is an apocalyptic number.

It is an amenable number.

55652561 is a deficient number, since it is larger than the sum of its proper divisors (1).

55652561 is an equidigital number, since it uses as much as digits as its factorization.

55652561 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 45000, while the sum is 35.

The square root of 55652561 is about 7460.0644099096. The cubic root of 55652561 is about 381.7933720755.

The spelling of 55652561 in words is "fifty-five million, six hundred fifty-two thousand, five hundred sixty-one".