55805206 has 4 divisors (see below), whose sum is σ = 83707812. Its totient is φ = 27902602.

The previous prime is 55805201. The next prime is 55805207. The reversal of 55805206 is 60250855.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×55805206² = 6228442033404872, which contains 22 as substring.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55805201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13951300 + ... + 13951303.

It is an arithmetic number, because the mean of its divisors is an integer number (20926953).

Almost surely, 2^55805206 is an apocalyptic number.

55805206 is a deficient number, since it is larger than the sum of its proper divisors (27902606).

55805206 is a wasteful number, since it uses less digits than its factorization.

55805206 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27902605.

The product of its (nonzero) digits is 12000, while the sum is 31.

The square root of 55805206 is about 7470.2882139848. The cubic root of 55805206 is about 382.1421170177.

The spelling of 55805206 in words is "fifty-five million, eight hundred five thousand, two hundred six".