55571919 has 16 divisors (see below), whose sum is σ = 79938432. Its totient is φ = 34136928.

The previous prime is 55571909. The next prime is 55571951. The reversal of 55571919 is 91917555.

It is not a de Polignac number, because 55571919 - 2⁹ = 55571407 is a prime.

It is a super-3 number, since 3×55571919³ (a number of 24 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55571909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31392 + ... + 33114.

It is an arithmetic number, because the mean of its divisors is an integer number (4996152).

Almost surely, 2^55571919 is an apocalyptic number.

55571919 is a deficient number, since it is larger than the sum of its proper divisors (24366513).

55571919 is a wasteful number, since it uses less digits than its factorization.

55571919 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2566.

The product of its digits is 70875, while the sum is 42.

The square root of 55571919 is about 7454.6575374057. The cubic root of 55571919 is about 381.6088734427.

The spelling of 55571919 in words is "fifty-five million, five hundred seventy-one thousand, nine hundred nineteen".