55110509 has 4 divisors (see below), whose sum is σ = 55616220. Its totient is φ = 54604800.

The previous prime is 55110499. The next prime is 55110533. The reversal of 55110509 is 90501155.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 90501155 = 5 ⋅18100231.

It can be written as a sum of positive squares in 2 ways, for example, as 23716900 + 31393609 = 4870^2 + 5603^2 .

It is a cyclic number.

It is not a de Polignac number, because 55110509 - 2⁴ = 55110493 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55110409) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 252692 + ... + 252909.

It is an arithmetic number, because the mean of its divisors is an integer number (13904055).

Almost surely, 2^55110509 is an apocalyptic number.

It is an amenable number.

55110509 is a deficient number, since it is larger than the sum of its proper divisors (505711).

55110509 is a wasteful number, since it uses less digits than its factorization.

55110509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 505710.

The product of its (nonzero) digits is 1125, while the sum is 26.

The square root of 55110509 is about 7423.6452636154. The cubic root of 55110509 is about 380.5497789956.

The spelling of 55110509 in words is "fifty-five million, one hundred ten thousand, five hundred nine".