55043647 has 2 divisors, whose sum is σ = 55043648. Its totient is φ = 55043646.

The previous prime is 55043617. The next prime is 55043657. The reversal of 55043647 is 74634055.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55043647 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55043617) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27521823 + 27521824.

It is an arithmetic number, because the mean of its divisors is an integer number (27521824).

Almost surely, 2^55043647 is an apocalyptic number.

55043647 is a deficient number, since it is larger than the sum of its proper divisors (1).

55043647 is an equidigital number, since it uses as much as digits as its factorization.

55043647 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 50400, while the sum is 34.

The square root of 55043647 is about 7419.1405836525. The cubic root of 55043647 is about 380.3958179411.

The spelling of 55043647 in words is "fifty-five million, forty-three thousand, six hundred forty-seven".