55321499 has 2 divisors, whose sum is σ = 55321500. Its totient is φ = 55321498.

The previous prime is 55321477. The next prime is 55321501. The reversal of 55321499 is 99412355.

55321499 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55321499 is a prime.

Together with 55321501, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (55321429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27660749 + 27660750.

It is an arithmetic number, because the mean of its divisors is an integer number (27660750).

Almost surely, 2^55321499 is an apocalyptic number.

55321499 is a deficient number, since it is larger than the sum of its proper divisors (1).

55321499 is an equidigital number, since it uses as much as digits as its factorization.

55321499 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 48600, while the sum is 38.

The square root of 55321499 is about 7437.8423618681. The cubic root of 55321499 is about 381.0348041494.

The spelling of 55321499 in words is "fifty-five million, three hundred twenty-one thousand, four hundred ninety-nine".