55267561 has 16 divisors (see below), whose sum is σ = 61896960. Its totient is φ = 49040640.

The previous prime is 55267559. The next prime is 55267573. The reversal of 55267561 is 16576255.

55267561 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 55267561 - 2¹ = 55267559 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 55267561.

It is not an unprimeable number, because it can be changed into a prime (55267501) 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 in 15 ways as a sum of consecutive naturals, for example, 128016 + ... + 128446.

It is an arithmetic number, because the mean of its divisors is an integer number (3868560).

Almost surely, 2^55267561 is an apocalyptic number.

It is an amenable number.

55267561 is a deficient number, since it is larger than the sum of its proper divisors (6629399).

55267561 is a wasteful number, since it uses less digits than its factorization.

55267561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 864.

The product of its digits is 63000, while the sum is 37.

The square root of 55267561 is about 7434.2155605013. The cubic root of 55267561 is about 380.9109286298.

The spelling of 55267561 in words is "fifty-five million, two hundred sixty-seven thousand, five hundred sixty-one".