55518829 has 2 divisors, whose sum is σ = 55518830. Its totient is φ = 55518828.

The previous prime is 55518761. The next prime is 55518863. The reversal of 55518829 is 92881555.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 33663204 + 21855625 = 5802^2 + 4675^2 .

It is a cyclic number.

It is not a de Polignac number, because 55518829 - 2¹⁷ = 55387757 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55518899) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27759414 + 27759415.

It is an arithmetic number, because the mean of its divisors is an integer number (27759415).

Almost surely, 2^55518829 is an apocalyptic number.

It is an amenable number.

55518829 is a deficient number, since it is larger than the sum of its proper divisors (1).

55518829 is an equidigital number, since it uses as much as digits as its factorization.

55518829 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 144000, while the sum is 43.

The square root of 55518829 is about 7451.0958254474. The cubic root of 55518829 is about 381.4873128268.

The spelling of 55518829 in words is "fifty-five million, five hundred eighteen thousand, eight hundred twenty-nine".