55381017 has 16 divisors (see below), whose sum is σ = 75036672. Its totient is φ = 36328320.

The previous prime is 55381013. The next prime is 55381021. The reversal of 55381017 is 71018355.

It is an interprime number because it is at equal distance from previous prime (55381013) and next prime (55381021).

It is not a de Polignac number, because 55381017 - 2² = 55381013 is a prime.

It is not an unprimeable number, because it can be changed into a prime (55381013) 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 15 ways as a sum of consecutive naturals, for example, 51667 + ... + 52727.

It is an arithmetic number, because the mean of its divisors is an integer number (4689792).

Almost surely, 2^55381017 is an apocalyptic number.

It is an amenable number.

55381017 is a deficient number, since it is larger than the sum of its proper divisors (19655655).

55381017 is a wasteful number, since it uses less digits than its factorization.

55381017 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1328.

The product of its (nonzero) digits is 4200, while the sum is 30.

The square root of 55381017 is about 7441.8423122235. The cubic root of 55381017 is about 381.1714014448.

It can be divided in two parts, 5538 and 1017, that added together give a triangular number (6555 = T₁₁₄).

The spelling of 55381017 in words is "fifty-five million, three hundred eighty-one thousand, seventeen".