55716289 has 2 divisors, whose sum is σ = 55716290. Its totient is φ = 55716288.

The previous prime is 55716263. The next prime is 55716299. The reversal of 55716289 is 98261755.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 30636225 + 25080064 = 5535^2 + 5008^2 .

It is a cyclic number.

It is not a de Polignac number, because 55716289 - 2⁷ = 55716161 is a prime.

It is not a weakly prime, because it can be changed into another prime (55716229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27858144 + 27858145.

It is an arithmetic number, because the mean of its divisors is an integer number (27858145).

Almost surely, 2^55716289 is an apocalyptic number.

It is an amenable number.

55716289 is a deficient number, since it is larger than the sum of its proper divisors (1).

55716289 is an equidigital number, since it uses as much as digits as its factorization.

55716289 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 151200, while the sum is 43.

The square root of 55716289 is about 7464.3344646392. The cubic root of 55716289 is about 381.9390475924.

The spelling of 55716289 in words is "fifty-five million, seven hundred sixteen thousand, two hundred eighty-nine".