55808101 has 4 divisors (see below), whose sum is σ = 56302092. Its totient is φ = 55314112.

The previous prime is 55808087. The next prime is 55808117. The reversal of 55808101 is 10180855.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 10180855 = 5 ⋅2036171.

It can be written as a sum of positive squares in 2 ways, for example, as 15992001 + 39816100 = 3999^2 + 6310^2 .

It is a cyclic number.

It is not a de Polignac number, because 55808101 - 2⁹ = 55807589 is a prime.

It is a super-2 number, since 2×55808101² = 6229088274452402, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 55808101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55808131) 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, 246826 + ... + 247051.

It is an arithmetic number, because the mean of its divisors is an integer number (14075523).

Almost surely, 2^55808101 is an apocalyptic number.

It is an amenable number.

55808101 is a deficient number, since it is larger than the sum of its proper divisors (493991).

55808101 is a wasteful number, since it uses less digits than its factorization.

55808101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 493990.

The product of its (nonzero) digits is 1600, while the sum is 28.

The square root of 55808101 is about 7470.4819790961. The cubic root of 55808101 is about 382.1487250171.

Adding to 55808101 its reverse (10180855), we get a palindrome (65988956).

The spelling of 55808101 in words is "fifty-five million, eight hundred eight thousand, one hundred one".