55660211 has 2 divisors, whose sum is σ = 55660212. Its totient is φ = 55660210.

The previous prime is 55660201. The next prime is 55660219. The reversal of 55660211 is 11206655.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 55660211 - 2⁶ = 55660147 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (55660219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27830105 + 27830106.

It is an arithmetic number, because the mean of its divisors is an integer number (27830106).

Almost surely, 2^55660211 is an apocalyptic number.

55660211 is a deficient number, since it is larger than the sum of its proper divisors (1).

55660211 is an equidigital number, since it uses as much as digits as its factorization.

55660211 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1800, while the sum is 26.

The square root of 55660211 is about 7460.5771224484. The cubic root of 55660211 is about 381.8108650439.

Adding to 55660211 its reverse (11206655), we get a palindrome (66866866).

The spelling of 55660211 in words is "fifty-five million, six hundred sixty thousand, two hundred eleven".