55617161 has 4 divisors (see below), whose sum is σ = 58544400. Its totient is φ = 52689924.

The previous prime is 55617143. The next prime is 55617173. The reversal of 55617161 is 16171655.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 55617161 - 2¹⁰ = 55616137 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (55617101) 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 in 3 ways as a sum of consecutive naturals, for example, 1463591 + ... + 1463628.

It is an arithmetic number, because the mean of its divisors is an integer number (14636100).

Almost surely, 2^55617161 is an apocalyptic number.

It is an amenable number.

55617161 is a deficient number, since it is larger than the sum of its proper divisors (2927239).

55617161 is a wasteful number, since it uses less digits than its factorization.

55617161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2927238.

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

The square root of 55617161 is about 7457.6913988177. The cubic root of 55617161 is about 381.7124033424.

The spelling of 55617161 in words is "fifty-five million, six hundred seventeen thousand, one hundred sixty-one".