55290223 has 2 divisors, whose sum is σ = 55290224. Its totient is φ = 55290222.

The previous prime is 55290187. The next prime is 55290241. The reversal of 55290223 is 32209255.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 55290223 - 2¹⁷ = 55159151 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 55290191 and 55290200.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55290023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27645111 + 27645112.

It is an arithmetic number, because the mean of its divisors is an integer number (27645112).

Almost surely, 2^55290223 is an apocalyptic number.

55290223 is a deficient number, since it is larger than the sum of its proper divisors (1).

55290223 is an equidigital number, since it uses as much as digits as its factorization.

55290223 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5400, while the sum is 28.

The square root of 55290223 is about 7435.7395731696. The cubic root of 55290223 is about 380.9629846262.

Adding to 55290223 its reverse (32209255), we get a palindrome (87499478).

The spelling of 55290223 in words is "fifty-five million, two hundred ninety thousand, two hundred twenty-three".