55459819 has 2 divisors, whose sum is σ = 55459820. Its totient is φ = 55459818.

The previous prime is 55459813. The next prime is 55459843. The reversal of 55459819 is 91895455.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 55459819 - 2¹¹ = 55457771 is a prime.

It is a super-2 number, since 2×55459819² = 6151583047025522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (55459813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27729909 + 27729910.

It is an arithmetic number, because the mean of its divisors is an integer number (27729910).

Almost surely, 2^55459819 is an apocalyptic number.

55459819 is a deficient number, since it is larger than the sum of its proper divisors (1).

55459819 is an equidigital number, since it uses as much as digits as its factorization.

55459819 is an evil number, because the sum of its binary digits is even.

The product of its digits is 324000, while the sum is 46.

The square root of 55459819 is about 7447.1349524498. The cubic root of 55459819 is about 381.3521061640.

The spelling of 55459819 in words is "fifty-five million, four hundred fifty-nine thousand, eight hundred nineteen".