55807783 has 2 divisors, whose sum is σ = 55807784. Its totient is φ = 55807782.

The previous prime is 55807771. The next prime is 55807813. The reversal of 55807783 is 38770855.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 55807783 - 2⁵ = 55807751 is a prime.

It is a super-2 number, since 2×55807783² = 6229017286750178, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55802783) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27903891 + 27903892.

It is an arithmetic number, because the mean of its divisors is an integer number (27903892).

Almost surely, 2^55807783 is an apocalyptic number.

55807783 is a deficient number, since it is larger than the sum of its proper divisors (1).

55807783 is an equidigital number, since it uses as much as digits as its factorization.

55807783 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 235200, while the sum is 43.

The square root of 55807783 is about 7470.4606952985. The cubic root of 55807783 is about 382.1479991755.

The spelling of 55807783 in words is "fifty-five million, eight hundred seven thousand, seven hundred eighty-three".