55906553 has 2 divisors, whose sum is σ = 55906554. Its totient is φ = 55906552.

The previous prime is 55906511. The next prime is 55906567. The reversal of 55906553 is 35560955.

It is a happy number.

55906553 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., 55905529 + 1024 = 7477^2 + 32^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55906553 is a prime.

It is not a weakly prime, because it can be changed into another prime (55906153) 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, 27953276 + 27953277.

It is an arithmetic number, because the mean of its divisors is an integer number (27953277).

Almost surely, 2^55906553 is an apocalyptic number.

It is an amenable number.

55906553 is a deficient number, since it is larger than the sum of its proper divisors (1).

55906553 is an equidigital number, since it uses as much as digits as its factorization.

55906553 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 101250, while the sum is 38.

The square root of 55906553 is about 7477.0684763482. The cubic root of 55906553 is about 382.3733113125.

The spelling of 55906553 in words is "fifty-five million, nine hundred six thousand, five hundred fifty-three".