55138090219 has 2 divisors, whose sum is σ = 55138090220. Its totient is φ = 55138090218.

The previous prime is 55138090151. The next prime is 55138090237. The reversal of 55138090219 is 91209083155.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 55138090219 - 2²⁹ = 54601219307 is a prime.

It is a super-2 number, since 2×55138090219² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (55138090519) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27569045109 + 27569045110.

It is an arithmetic number, because the mean of its divisors is an integer number (27569045110).

Almost surely, 2^55138090219 is an apocalyptic number.

55138090219 is a deficient number, since it is larger than the sum of its proper divisors (1).

55138090219 is an equidigital number, since it uses as much as digits as its factorization.

55138090219 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 97200, while the sum is 43.

The spelling of 55138090219 in words is "fifty-five billion, one hundred thirty-eight million, ninety thousand, two hundred nineteen".