55242623 has 2 divisors, whose sum is σ = 55242624. Its totient is φ = 55242622.

The previous prime is 55242613. The next prime is 55242641. The reversal of 55242623 is 32624255.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 55242623 - 2¹⁸ = 54980479 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55242613) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27621311 + 27621312.

It is an arithmetic number, because the mean of its divisors is an integer number (27621312).

Almost surely, 2^55242623 is an apocalyptic number.

55242623 is a deficient number, since it is larger than the sum of its proper divisors (1).

55242623 is an equidigital number, since it uses as much as digits as its factorization.

55242623 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 14400, while the sum is 29.

The square root of 55242623 is about 7432.5381263738. The cubic root of 55242623 is about 380.8536280742.

Adding to 55242623 its reverse (32624255), we get a palindrome (87866878).

The spelling of 55242623 in words is "fifty-five million, two hundred forty-two thousand, six hundred twenty-three".