54947521 has 2 divisors, whose sum is σ = 54947522. Its totient is φ = 54947520.

The previous prime is 54947429. The next prime is 54947561. The reversal of 54947521 is 12574945.

54947521 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 can be written as a sum of positive squares in only one way, i.e., 28569025 + 26378496 = 5345^2 + 5136^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-54947521 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (54947561) 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, 27473760 + 27473761.

It is an arithmetic number, because the mean of its divisors is an integer number (27473761).

Almost surely, 2^54947521 is an apocalyptic number.

It is an amenable number.

54947521 is a deficient number, since it is larger than the sum of its proper divisors (1).

54947521 is an equidigital number, since it uses as much as digits as its factorization.

54947521 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 50400, while the sum is 37.

The square root of 54947521 is about 7412.6595092450. The cubic root of 54947521 is about 380.1742529539.

The spelling of 54947521 in words is "fifty-four million, nine hundred forty-seven thousand, five hundred twenty-one".