55506947 has 2 divisors, whose sum is σ = 55506948. Its totient is φ = 55506946.

The previous prime is 55506931. The next prime is 55506949. The reversal of 55506947 is 74960555.

55506947 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 is a cyclic number.

It is not a de Polignac number, because 55506947 - 2⁴ = 55506931 is a prime.

Together with 55506949, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (55506949) 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, 27753473 + 27753474.

It is an arithmetic number, because the mean of its divisors is an integer number (27753474).

Almost surely, 2^55506947 is an apocalyptic number.

55506947 is a deficient number, since it is larger than the sum of its proper divisors (1).

55506947 is an equidigital number, since it uses as much as digits as its factorization.

55506947 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 189000, while the sum is 41.

The square root of 55506947 is about 7450.2984503978. The cubic root of 55506947 is about 381.4600959003.

The spelling of 55506947 in words is "fifty-five million, five hundred six thousand, nine hundred forty-seven".