55505123 has 2 divisors, whose sum is σ = 55505124. Its totient is φ = 55505122.

The previous prime is 55505081. The next prime is 55505129. The reversal of 55505123 is 32150555.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 55505123 - 2¹² = 55501027 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 55505092 and 55505101.

It is not a weakly prime, because it can be changed into another prime (55505129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27752561 + 27752562.

It is an arithmetic number, because the mean of its divisors is an integer number (27752562).

Almost surely, 2^55505123 is an apocalyptic number.

55505123 is a deficient number, since it is larger than the sum of its proper divisors (1).

55505123 is an equidigital number, since it uses as much as digits as its factorization.

55505123 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3750, while the sum is 26.

The square root of 55505123 is about 7450.1760381886. The cubic root of 55505123 is about 381.4559174994.

Adding to 55505123 its reverse (32150555), we get a palindrome (87655678).

The spelling of 55505123 in words is "fifty-five million, five hundred five thousand, one hundred twenty-three".