55512329 has 2 divisors, whose sum is σ = 55512330. Its totient is φ = 55512328.

The previous prime is 55512299. The next prime is 55512337. The reversal of 55512329 is 92321555.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 35081929 + 20430400 = 5923^2 + 4520^2 .

It is a cyclic number.

It is not a de Polignac number, because 55512329 - 2²⁰ = 54463753 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 55512295 and 55512304.

It is not a weakly prime, because it can be changed into another prime (55512389) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27756164 + 27756165.

It is an arithmetic number, because the mean of its divisors is an integer number (27756165).

Almost surely, 2^55512329 is an apocalyptic number.

It is an amenable number.

55512329 is a deficient number, since it is larger than the sum of its proper divisors (1).

55512329 is an equidigital number, since it uses as much as digits as its factorization.

55512329 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13500, while the sum is 32.

The square root of 55512329 is about 7450.6596352269. The cubic root of 55512329 is about 381.4724243985.

The spelling of 55512329 in words is "fifty-five million, five hundred twelve thousand, three hundred twenty-nine".