55408081 has 8 divisors (see below), whose sum is σ = 58331520. Its totient is φ = 52527552.

The previous prime is 55408063. The next prime is 55408103. The reversal of 55408081 is 18080455.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 55408081 - 2¹⁷ = 55277009 is a prime.

It is a super-2 number, since 2×55408081² = 6140110880205122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55408181) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8061 + ... + 13258.

It is an arithmetic number, because the mean of its divisors is an integer number (7291440).

Almost surely, 2^55408081 is an apocalyptic number.

It is an amenable number.

55408081 is a deficient number, since it is larger than the sum of its proper divisors (2923439).

55408081 is a wasteful number, since it uses less digits than its factorization.

55408081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21455.

The product of its (nonzero) digits is 6400, while the sum is 31.

The square root of 55408081 is about 7443.6604570601. The cubic root of 55408081 is about 381.2334825416.

The spelling of 55408081 in words is "fifty-five million, four hundred eight thousand, eighty-one".