55138419 has 12 divisors (see below), whose sum is σ = 91022256. Its totient is φ = 31507632.

The previous prime is 55138411. The next prime is 55138423. The reversal of 55138419 is 91483155.

55138419 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 55138419 - 2³ = 55138411 is a prime.

It is a super-2 number, since 2×55138419² = 6080490499639122, which contains 22 as substring.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (55138411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 437544 + ... + 437669.

It is an arithmetic number, because the mean of its divisors is an integer number (7585188).

Almost surely, 2^55138419 is an apocalyptic number.

55138419 is a deficient number, since it is larger than the sum of its proper divisors (35883837).

55138419 is a wasteful number, since it uses less digits than its factorization.

55138419 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 875226 (or 875223 counting only the distinct ones).

The product of its digits is 21600, while the sum is 36.

The square root of 55138419 is about 7425.5248299363. The cubic root of 55138419 is about 380.6140096481.

The spelling of 55138419 in words is "fifty-five million, one hundred thirty-eight thousand, four hundred nineteen".