55206439 has 2 divisors, whose sum is σ = 55206440. Its totient is φ = 55206438.

The previous prime is 55206421. The next prime is 55206451. The reversal of 55206439 is 93460255.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 55206439 - 2¹⁷ = 55075367 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55206409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27603219 + 27603220.

It is an arithmetic number, because the mean of its divisors is an integer number (27603220).

Almost surely, 2^55206439 is an apocalyptic number.

55206439 is a deficient number, since it is larger than the sum of its proper divisors (1).

55206439 is an equidigital number, since it uses as much as digits as its factorization.

55206439 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32400, while the sum is 34.

The square root of 55206439 is about 7430.1035659000. The cubic root of 55206439 is about 380.7704566821.

The spelling of 55206439 in words is "fifty-five million, two hundred six thousand, four hundred thirty-nine".