55501289 has 2 divisors, whose sum is σ = 55501290. Its totient is φ = 55501288.

The previous prime is 55501267. The next prime is 55501301. The reversal of 55501289 is 98210555.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 55056400 + 444889 = 7420^2 + 667^2 .

It is a cyclic number.

It is not a de Polignac number, because 55501289 - 2¹⁶ = 55435753 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (55501189) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27750644 + 27750645.

It is an arithmetic number, because the mean of its divisors is an integer number (27750645).

Almost surely, 2^55501289 is an apocalyptic number.

It is an amenable number.

55501289 is a deficient number, since it is larger than the sum of its proper divisors (1).

55501289 is an equidigital number, since it uses as much as digits as its factorization.

55501289 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18000, while the sum is 35.

The square root of 55501289 is about 7449.9187243889. The cubic root of 55501289 is about 381.4471343121.

The spelling of 55501289 in words is "fifty-five million, five hundred one thousand, two hundred eighty-nine".