55684081 has 4 divisors (see below), whose sum is σ = 58105152. Its totient is φ = 53263012.

The previous prime is 55684073. The next prime is 55684103. The reversal of 55684081 is 18048655.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 18048655 = 5 ⋅3609731.

It is a cyclic number.

It is not a de Polignac number, because 55684081 - 2³ = 55684073 is a prime.

It is a super-2 number, since 2×55684081² = 6201433753629122, 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 55684081.

It is not an unprimeable number, because it can be changed into a prime (55684021) 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, 1210501 + ... + 1210546.

It is an arithmetic number, because the mean of its divisors is an integer number (14526288).

Almost surely, 2^55684081 is an apocalyptic number.

It is an amenable number.

55684081 is a deficient number, since it is larger than the sum of its proper divisors (2421071).

55684081 is a wasteful number, since it uses less digits than its factorization.

55684081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2421070.

The product of its (nonzero) digits is 38400, while the sum is 37.

The square root of 55684081 is about 7462.1766931640. The cubic root of 55684081 is about 381.8654373777.

The spelling of 55684081 in words is "fifty-five million, six hundred eighty-four thousand, eighty-one".