55609171 has 2 divisors, whose sum is σ = 55609172. Its totient is φ = 55609170.

The previous prime is 55609139. The next prime is 55609189. The reversal of 55609171 is 17190655.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 55609171 - 2⁵ = 55609139 is a prime.

It is not a weakly prime, because it can be changed into another prime (55609111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27804585 + 27804586.

It is an arithmetic number, because the mean of its divisors is an integer number (27804586).

Almost surely, 2^55609171 is an apocalyptic number.

55609171 is a deficient number, since it is larger than the sum of its proper divisors (1).

55609171 is an equidigital number, since it uses as much as digits as its factorization.

55609171 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9450, while the sum is 34.

The square root of 55609171 is about 7457.1556910125. The cubic root of 55609171 is about 381.6941234440.

The spelling of 55609171 in words is "fifty-five million, six hundred nine thousand, one hundred seventy-one".