55115783 has 2 divisors, whose sum is σ = 55115784. Its totient is φ = 55115782.

The previous prime is 55115773. The next prime is 55115791. The reversal of 55115783 is 38751155.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 55115783 - 2⁸ = 55115527 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55115743) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27557891 + 27557892.

It is an arithmetic number, because the mean of its divisors is an integer number (27557892).

Almost surely, 2^55115783 is an apocalyptic number.

55115783 is a deficient number, since it is larger than the sum of its proper divisors (1).

55115783 is an equidigital number, since it uses as much as digits as its factorization.

55115783 is an evil number, because the sum of its binary digits is even.

The product of its digits is 21000, while the sum is 35.

The square root of 55115783 is about 7424.0004714440. Note that the first 3 decimals coincide. The cubic root of 55115783 is about 380.5619179721.

The spelling of 55115783 in words is "fifty-five million, one hundred fifteen thousand, seven hundred eighty-three".