55015223 has 2 divisors, whose sum is σ = 55015224. Its totient is φ = 55015222.

The previous prime is 55015217. The next prime is 55015231. The reversal of 55015223 is 32251055.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 55015223 - 2⁶ = 55015159 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55015253) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27507611 + 27507612.

It is an arithmetic number, because the mean of its divisors is an integer number (27507612).

Almost surely, 2^55015223 is an apocalyptic number.

55015223 is a deficient number, since it is larger than the sum of its proper divisors (1).

55015223 is an equidigital number, since it uses as much as digits as its factorization.

55015223 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1500, while the sum is 23.

The square root of 55015223 is about 7417.2247505384. The cubic root of 55015223 is about 380.3303291094.

Adding to 55015223 its reverse (32251055), we get a palindrome (87266278).

The spelling of 55015223 in words is "fifty-five million, fifteen thousand, two hundred twenty-three".