55225805 has 4 divisors (see below), whose sum is σ = 66270972. Its totient is φ = 44180640.

The previous prime is 55225777. The next prime is 55225813. The reversal of 55225805 is 50852255.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 50852255 = 5 ⋅10170451.

It can be written as a sum of positive squares in 2 ways, for example, as 13053769 + 42172036 = 3613^2 + 6494^2 .

It is not a de Polignac number, because 55225805 - 2¹² = 55221709 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5522576 + ... + 5522585.

It is an arithmetic number, because the mean of its divisors is an integer number (16567743).

Almost surely, 2^55225805 is an apocalyptic number.

It is an amenable number.

55225805 is a deficient number, since it is larger than the sum of its proper divisors (11045167).

55225805 is a wasteful number, since it uses less digits than its factorization.

55225805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11045166.

The product of its (nonzero) digits is 20000, while the sum is 32.

The square root of 55225805 is about 7431.4066636136. The cubic root of 55225805 is about 380.8149752727.

The spelling of 55225805 in words is "fifty-five million, two hundred twenty-five thousand, eight hundred five".