55311081 has 16 divisors (see below), whose sum is σ = 89241984. Its totient is φ = 29746944.

The previous prime is 55311077. The next prime is 55311089. The reversal of 55311081 is 18011355.

It is not a de Polignac number, because 55311081 - 2² = 55311077 is a prime.

It is a super-3 number, since 3×55311081³ (a number of 24 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (55311089) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 77110 + ... + 77823.

It is an arithmetic number, because the mean of its divisors is an integer number (5577624).

Almost surely, 2^55311081 is an apocalyptic number.

55311081 is a gapful number since it is divisible by the number (51) formed by its first and last digit.

It is an amenable number.

55311081 is a deficient number, since it is larger than the sum of its proper divisors (33930903).

55311081 is a wasteful number, since it uses less digits than its factorization.

55311081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 154960.

The product of its (nonzero) digits is 600, while the sum is 24.

The square root of 55311081 is about 7437.1419913835. The cubic root of 55311081 is about 381.0108841553.

The spelling of 55311081 in words is "fifty-five million, three hundred eleven thousand, eighty-one".