55189069 has 4 divisors (see below), whose sum is σ = 59434396. Its totient is φ = 50943744.

The previous prime is 55189067. The next prime is 55189073. The reversal of 55189069 is 96098155.

It is a happy number.

55189069 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 96098155 = 5 ⋅19219631.

It can be written as a sum of positive squares in 2 ways, for example, as 14062500 + 41126569 = 3750^2 + 6413^2 .

It is a cyclic number.

It is not a de Polignac number, because 55189069 - 2¹ = 55189067 is a prime.

It is a super-2 number, since 2×55189069² = 6091666674173522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55189063) 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 3 ways as a sum of consecutive naturals, for example, 2122644 + ... + 2122669.

It is an arithmetic number, because the mean of its divisors is an integer number (14858599).

Almost surely, 2^55189069 is an apocalyptic number.

It is an amenable number.

55189069 is a deficient number, since it is larger than the sum of its proper divisors (4245327).

55189069 is a wasteful number, since it uses less digits than its factorization.

55189069 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4245326.

The product of its (nonzero) digits is 97200, while the sum is 43.

The square root of 55189069 is about 7428.9345804092. The cubic root of 55189069 is about 380.7305176415.

The spelling of 55189069 in words is "fifty-five million, one hundred eighty-nine thousand, sixty-nine".