55822687 has 2 divisors, whose sum is σ = 55822688. Its totient is φ = 55822686.

The previous prime is 55822639. The next prime is 55822721. The reversal of 55822687 is 78622855.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55822687 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55822787) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27911343 + 27911344.

It is an arithmetic number, because the mean of its divisors is an integer number (27911344).

Almost surely, 2^55822687 is an apocalyptic number.

55822687 is a deficient number, since it is larger than the sum of its proper divisors (1).

55822687 is an equidigital number, since it uses as much as digits as its factorization.

55822687 is an evil number, because the sum of its binary digits is even.

The product of its digits is 268800, while the sum is 43.

The square root of 55822687 is about 7471.4581575486. The cubic root of 55822687 is about 382.1820149019.

The spelling of 55822687 in words is "fifty-five million, eight hundred twenty-two thousand, six hundred eighty-seven".