55223507 has 2 divisors, whose sum is σ = 55223508. Its totient is φ = 55223506.

The previous prime is 55223489. The next prime is 55223513. The reversal of 55223507 is 70532255.

55223507 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 55223507 - 2⁸ = 55223251 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 55223507.

It is not a weakly prime, because it can be changed into another prime (55223527) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27611753 + 27611754.

It is an arithmetic number, because the mean of its divisors is an integer number (27611754).

Almost surely, 2^55223507 is an apocalyptic number.

55223507 is a deficient number, since it is larger than the sum of its proper divisors (1).

55223507 is an equidigital number, since it uses as much as digits as its factorization.

55223507 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10500, while the sum is 29.

The square root of 55223507 is about 7431.2520479392. The cubic root of 55223507 is about 380.8096931711.

The spelling of 55223507 in words is "fifty-five million, two hundred twenty-three thousand, five hundred seven".