55020223 has 2 divisors, whose sum is σ = 55020224. Its totient is φ = 55020222.

The previous prime is 55020197. The next prime is 55020253. The reversal of 55020223 is 32202055.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 55020223 - 2⁵ = 55020191 is a prime.

It is a plaindrome in base 16.

It is a self number, because there is not a number n which added to its sum of digits gives 55020223.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55020253) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27510111 + 27510112.

It is an arithmetic number, because the mean of its divisors is an integer number (27510112).

Almost surely, 2^55020223 is an apocalyptic number.

55020223 is a deficient number, since it is larger than the sum of its proper divisors (1).

55020223 is an equidigital number, since it uses as much as digits as its factorization.

55020223 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 600, while the sum is 19.

The square root of 55020223 is about 7417.5617961700. The cubic root of 55020223 is about 380.3418507328.

Adding to 55020223 its reverse (32202055), we get a palindrome (87222278).

The spelling of 55020223 in words is "fifty-five million, twenty thousand, two hundred twenty-three".