54221647 has 2 divisors, whose sum is σ = 54221648. Its totient is φ = 54221646.

The previous prime is 54221641. The next prime is 54221669. The reversal of 54221647 is 74612245.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-54221647 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (54221641) 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, 27110823 + 27110824.

It is an arithmetic number, because the mean of its divisors is an integer number (27110824).

Almost surely, 2^54221647 is an apocalyptic number.

54221647 is a deficient number, since it is larger than the sum of its proper divisors (1).

54221647 is an equidigital number, since it uses as much as digits as its factorization.

54221647 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13440, while the sum is 31.

The square root of 54221647 is about 7363.5349527248. The cubic root of 54221647 is about 378.4927529533.

The spelling of 54221647 in words is "fifty-four million, two hundred twenty-one thousand, six hundred forty-seven".