55324813 has 2 divisors, whose sum is σ = 55324814. Its totient is φ = 55324812.

The previous prime is 55324807. The next prime is 55324849. The reversal of 55324813 is 31842355.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 40678884 + 14645929 = 6378^2 + 3827^2 .

It is a cyclic number.

It is not a de Polignac number, because 55324813 - 2⁹ = 55324301 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55424813) 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, 27662406 + 27662407.

It is an arithmetic number, because the mean of its divisors is an integer number (27662407).

Almost surely, 2^55324813 is an apocalyptic number.

It is an amenable number.

55324813 is a deficient number, since it is larger than the sum of its proper divisors (1).

55324813 is an equidigital number, since it uses as much as digits as its factorization.

55324813 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 14400, while the sum is 31.

The square root of 55324813 is about 7438.0651381929. The cubic root of 55324813 is about 381.0424125485.

The spelling of 55324813 in words is "fifty-five million, three hundred twenty-four thousand, eight hundred thirteen".