55611223 has 2 divisors, whose sum is σ = 55611224. Its totient is φ = 55611222.

The previous prime is 55611221. The next prime is 55611239. The reversal of 55611223 is 32211655.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 55611223 - 2¹ = 55611221 is a prime.

Together with 55611221, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55611221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27805611 + 27805612.

It is an arithmetic number, because the mean of its divisors is an integer number (27805612).

Almost surely, 2^55611223 is an apocalyptic number.

55611223 is a deficient number, since it is larger than the sum of its proper divisors (1).

55611223 is an equidigital number, since it uses as much as digits as its factorization.

55611223 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1800, while the sum is 25.

The square root of 55611223 is about 7457.2932757134. The cubic root of 55611223 is about 381.6988182734.

Adding to 55611223 its reverse (32211655), we get a palindrome (87822878).

The spelling of 55611223 in words is "fifty-five million, six hundred eleven thousand, two hundred twenty-three".