55306649 has 2 divisors, whose sum is σ = 55306650. Its totient is φ = 55306648.

The previous prime is 55306637. The next prime is 55306681. The reversal of 55306649 is 94660355.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 43983424 + 11323225 = 6632^2 + 3365^2 .

It is a cyclic number.

It is not a de Polignac number, because 55306649 - 2⁴ = 55306633 is a prime.

It is not a weakly prime, because it can be changed into another prime (55306609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27653324 + 27653325.

It is an arithmetic number, because the mean of its divisors is an integer number (27653325).

Almost surely, 2^55306649 is an apocalyptic number.

It is an amenable number.

55306649 is a deficient number, since it is larger than the sum of its proper divisors (1).

55306649 is an equidigital number, since it uses as much as digits as its factorization.

55306649 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 97200, while the sum is 38.

The square root of 55306649 is about 7436.8440214919. The cubic root of 55306649 is about 381.0007072594. Note that the first 3 decimals are identical.

It can be divided in two parts, 55306 and 649, that added together give a palindrome (55955).

The spelling of 55306649 in words is "fifty-five million, three hundred six thousand, six hundred forty-nine".