55555161 has 8 divisors (see below), whose sum is σ = 74140704. Its totient is φ = 37003200.

The previous prime is 55555147. The next prime is 55555163. The reversal of 55555161 is 16155555.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 55555161 - 2⁷ = 55555033 is a prime.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (55555163) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4240 + ... + 11361.

It is an arithmetic number, because the mean of its divisors is an integer number (9267588).

Almost surely, 2^55555161 is an apocalyptic number.

It is an amenable number.

55555161 is a deficient number, since it is larger than the sum of its proper divisors (18585543).

55555161 is a wasteful number, since it uses less digits than its factorization.

55555161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16791.

The product of its digits is 18750, while the sum is 33.

The square root of 55555161 is about 7453.5334573610. The cubic root of 55555161 is about 381.5705108756.

The spelling of 55555161 in words is "fifty-five million, five hundred fifty-five thousand, one hundred sixty-one".