55222423 has 2 divisors, whose sum is σ = 55222424. Its totient is φ = 55222422.

The previous prime is 55222421. The next prime is 55222459. The reversal of 55222423 is 32422255.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 55222423 - 2¹ = 55222421 is a prime.

Together with 55222421, 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 (55222421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27611211 + 27611212.

It is an arithmetic number, because the mean of its divisors is an integer number (27611212).

Almost surely, 2^55222423 is an apocalyptic number.

55222423 is a deficient number, since it is larger than the sum of its proper divisors (1).

55222423 is an equidigital number, since it uses as much as digits as its factorization.

55222423 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4800, while the sum is 25.

The square root of 55222423 is about 7431.1791123616. The cubic root of 55222423 is about 380.8072014761.

Adding to 55222423 its reverse (32422255), we get a palindrome (87644678).

The spelling of 55222423 in words is "fifty-five million, two hundred twenty-two thousand, four hundred twenty-three".