55078081 has 4 divisors (see below), whose sum is σ = 55222272. Its totient is φ = 54933892.

The previous prime is 55078073. The next prime is 55078091. The reversal of 55078081 is 18087055.

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.

It is a cyclic number.

It is not a de Polignac number, because 55078081 - 2³ = 55078073 is a prime.

It is a super-2 number, since 2×55078081² = 6067190013285122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55078021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 71521 + ... + 72286.

It is an arithmetic number, because the mean of its divisors is an integer number (13805568).

Almost surely, 2^55078081 is an apocalyptic number.

It is an amenable number.

55078081 is a deficient number, since it is larger than the sum of its proper divisors (144191).

55078081 is a wasteful number, since it uses less digits than its factorization.

55078081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144190.

The product of its (nonzero) digits is 11200, while the sum is 34.

The square root of 55078081 is about 7421.4608400233. The cubic root of 55078081 is about 380.4751236066.

The spelling of 55078081 in words is "fifty-five million, seventy-eight thousand, eighty-one".