55111201 has 2 divisors, whose sum is σ = 55111202. Its totient is φ = 55111200.

The previous prime is 55111193. The next prime is 55111219. The reversal of 55111201 is 10211155.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 54774801 + 336400 = 7401^2 + 580^2 .

It is a cyclic number.

It is not a de Polignac number, because 55111201 - 2³ = 55111193 is a prime.

It is not a weakly prime, because it can be changed into another prime (55111261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27555600 + 27555601.

It is an arithmetic number, because the mean of its divisors is an integer number (27555601).

Almost surely, 2^55111201 is an apocalyptic number.

It is an amenable number.

55111201 is a deficient number, since it is larger than the sum of its proper divisors (1).

55111201 is an equidigital number, since it uses as much as digits as its factorization.

55111201 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 50, while the sum is 16.

The square root of 55111201 is about 7423.6918712996. The cubic root of 55111201 is about 380.5513717913.

Adding to 55111201 its reverse (10211155), we get a palindrome (65322356).

The spelling of 55111201 in words is "fifty-five million, one hundred eleven thousand, two hundred one".