55206839 has 2 divisors, whose sum is σ = 55206840. Its totient is φ = 55206838.

The previous prime is 55206829. The next prime is 55206847. The reversal of 55206839 is 93860255.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 55206839 - 2⁸ = 55206583 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55206829) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27603419 + 27603420.

It is an arithmetic number, because the mean of its divisors is an integer number (27603420).

Almost surely, 2^55206839 is an apocalyptic number.

55206839 is a deficient number, since it is larger than the sum of its proper divisors (1).

55206839 is an equidigital number, since it uses as much as digits as its factorization.

55206839 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 64800, while the sum is 38.

The square root of 55206839 is about 7430.1304833765. The cubic root of 55206839 is about 380.7713763080.

The spelling of 55206839 in words is "fifty-five million, two hundred six thousand, eight hundred thirty-nine".