55280947 has 2 divisors, whose sum is σ = 55280948. Its totient is φ = 55280946.

The previous prime is 55280933. The next prime is 55280969. The reversal of 55280947 is 74908255.

55280947 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55280947 is a prime.

It is not a weakly prime, because it can be changed into another prime (55280987) 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, 27640473 + 27640474.

It is an arithmetic number, because the mean of its divisors is an integer number (27640474).

Almost surely, 2^55280947 is an apocalyptic number.

55280947 is a deficient number, since it is larger than the sum of its proper divisors (1).

55280947 is an equidigital number, since it uses as much as digits as its factorization.

55280947 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 100800, while the sum is 40.

The square root of 55280947 is about 7435.1158027296. The cubic root of 55280947 is about 380.9416788082.

The spelling of 55280947 in words is "fifty-five million, two hundred eighty thousand, nine hundred forty-seven".