55611547 has 2 divisors, whose sum is σ = 55611548. Its totient is φ = 55611546.

The previous prime is 55611529. The next prime is 55611553. The reversal of 55611547 is 74511655.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55611547 is a prime.

It is not a weakly prime, because it can be changed into another prime (55611527) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27805773 + 27805774.

It is an arithmetic number, because the mean of its divisors is an integer number (27805774).

Almost surely, 2^55611547 is an apocalyptic number.

55611547 is a deficient number, since it is larger than the sum of its proper divisors (1).

55611547 is an equidigital number, since it uses as much as digits as its factorization.

55611547 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 21000, while the sum is 34.

The square root of 55611547 is about 7457.3149993815. The cubic root of 55611547 is about 381.6995595516.

The spelling of 55611547 in words is "fifty-five million, six hundred eleven thousand, five hundred forty-seven".