55165601 has 2 divisors, whose sum is σ = 55165602. Its totient is φ = 55165600.

The previous prime is 55165597. The next prime is 55165613. The reversal of 55165601 is 10656155.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 42915601 + 12250000 = 6551^2 + 3500^2 .

It is a cyclic number.

It is not a de Polignac number, because 55165601 - 2² = 55165597 is a prime.

It is equal to p_3291536 and since 55165601 and 3291536 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (55165681) 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, 27582800 + 27582801.

It is an arithmetic number, because the mean of its divisors is an integer number (27582801).

Almost surely, 2^55165601 is an apocalyptic number.

It is an amenable number.

55165601 is a deficient number, since it is larger than the sum of its proper divisors (1).

55165601 is an equidigital number, since it uses as much as digits as its factorization.

55165601 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4500, while the sum is 29.

The square root of 55165601 is about 7427.3549127533. The cubic root of 55165601 is about 380.6765440876.

The spelling of 55165601 in words is "fifty-five million, one hundred sixty-five thousand, six hundred one".