55442665 has 16 divisors (see below), whose sum is σ = 70297920. Its totient is φ = 41860800.

The previous prime is 55442641. The next prime is 55442669. The reversal of 55442665 is 56624455.

It is not a de Polignac number, because 55442665 - 2¹⁷ = 55311593 is a prime.

It is not an unprimeable number, because it can be changed into a prime (55442669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28215 + ... + 30115.

It is an arithmetic number, because the mean of its divisors is an integer number (4393620).

Almost surely, 2^55442665 is an apocalyptic number.

It is an amenable number.

55442665 is a deficient number, since it is larger than the sum of its proper divisors (14855255).

55442665 is a wasteful number, since it uses less digits than its factorization.

55442665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2232.

The product of its digits is 144000, while the sum is 37.

The square root of 55442665 is about 7445.9831452938. The cubic root of 55442665 is about 381.3127840703.

The spelling of 55442665 in words is "fifty-five million, four hundred forty-two thousand, six hundred sixty-five".