55511161 has 2 divisors, whose sum is σ = 55511162. Its totient is φ = 55511160.

The previous prime is 55511149. The next prime is 55511189. The reversal of 55511161 is 16111555.

55511161 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., 46172025 + 9339136 = 6795^2 + 3056^2 .

It is a cyclic number.

It is not a de Polignac number, because 55511161 - 2¹⁵ = 55478393 is a prime.

It is not a weakly prime, because it can be changed into another prime (55511461) 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, 27755580 + 27755581.

It is an arithmetic number, because the mean of its divisors is an integer number (27755581).

Almost surely, 2^55511161 is an apocalyptic number.

It is an amenable number.

55511161 is a deficient number, since it is larger than the sum of its proper divisors (1).

55511161 is an equidigital number, since it uses as much as digits as its factorization.

55511161 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 750, while the sum is 25.

The square root of 55511161 is about 7450.5812524930. The cubic root of 55511161 is about 381.4697489393.

The spelling of 55511161 in words is "fifty-five million, five hundred eleven thousand, one hundred sixty-one".