55560191 has 2 divisors, whose sum is σ = 55560192. Its totient is φ = 55560190.

The previous prime is 55560187. The next prime is 55560217. The reversal of 55560191 is 19106555.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 55560191 - 2² = 55560187 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55560121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27780095 + 27780096.

It is an arithmetic number, because the mean of its divisors is an integer number (27780096).

Almost surely, 2^55560191 is an apocalyptic number.

55560191 is a deficient number, since it is larger than the sum of its proper divisors (1).

55560191 is an equidigital number, since it uses as much as digits as its factorization.

55560191 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6750, while the sum is 32.

The square root of 55560191 is about 7453.8708735797. The cubic root of 55560191 is about 381.5820264078.

The spelling of 55560191 in words is "fifty-five million, five hundred sixty thousand, one hundred ninety-one".