55338919 has 2 divisors, whose sum is σ = 55338920. Its totient is φ = 55338918.

The previous prime is 55338917. The next prime is 55338953. The reversal of 55338919 is 91983355.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 55338919 - 2¹ = 55338917 is a prime.

It is a super-2 number, since 2×55338919² = 6124791912177122, which contains 22 as substring.

Together with 55338917, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55338911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27669459 + 27669460.

It is an arithmetic number, because the mean of its divisors is an integer number (27669460).

Almost surely, 2^55338919 is an apocalyptic number.

55338919 is a deficient number, since it is larger than the sum of its proper divisors (1).

55338919 is an equidigital number, since it uses as much as digits as its factorization.

55338919 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 145800, while the sum is 43.

The square root of 55338919 is about 7439.0133082285. The cubic root of 55338919 is about 381.0747942065.

The spelling of 55338919 in words is "fifty-five million, three hundred thirty-eight thousand, nine hundred nineteen".