55822639 has 2 divisors, whose sum is σ = 55822640. Its totient is φ = 55822638.

The previous prime is 55822619. The next prime is 55822687. The reversal of 55822639 is 93622855.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 55822639 - 2¹¹ = 55820591 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55822609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27911319 + 27911320.

It is an arithmetic number, because the mean of its divisors is an integer number (27911320).

Almost surely, 2^55822639 is an apocalyptic number.

55822639 is a deficient number, since it is larger than the sum of its proper divisors (1).

55822639 is an equidigital number, since it uses as much as digits as its factorization.

55822639 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 129600, while the sum is 40.

The square root of 55822639 is about 7471.4549453236. The cubic root of 55822639 is about 382.1819053602.

The spelling of 55822639 in words is "fifty-five million, eight hundred twenty-two thousand, six hundred thirty-nine".