55304239 has 2 divisors, whose sum is σ = 55304240. Its totient is φ = 55304238.

The previous prime is 55304219. The next prime is 55304251. The reversal of 55304239 is 93240355.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 55304239 - 2⁹ = 55303727 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 55304239.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55304219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27652119 + 27652120.

It is an arithmetic number, because the mean of its divisors is an integer number (27652120).

Almost surely, 2^55304239 is an apocalyptic number.

55304239 is a deficient number, since it is larger than the sum of its proper divisors (1).

55304239 is an equidigital number, since it uses as much as digits as its factorization.

55304239 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16200, while the sum is 31.

The square root of 55304239 is about 7436.6819886291. The cubic root of 55304239 is about 380.9951731144.

The spelling of 55304239 in words is "fifty-five million, three hundred four thousand, two hundred thirty-nine".