55917783 has 20 divisors (see below), whose sum is σ = 84157920. Its totient is φ = 36999072.

The previous prime is 55917739. The next prime is 55917791. The reversal of 55917783 is 38771955.

55917783 is a `hidden beast` number, since 559 + 17 + 7 + 83 = 666.

It is not a de Polignac number, because 55917783 - 2⁸ = 55917527 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55917283) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 8578 + ... + 13616.

It is an arithmetic number, because the mean of its divisors is an integer number (4207896).

Almost surely, 2^55917783 is an apocalyptic number.

55917783 is a deficient number, since it is larger than the sum of its proper divisors (28240137).

55917783 is a wasteful number, since it uses less digits than its factorization.

55917783 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5188 (or 5179 counting only the distinct ones).

The product of its digits is 264600, while the sum is 45.

The square root of 55917783 is about 7477.8194014031. The cubic root of 55917783 is about 382.3989121563.

The spelling of 55917783 in words is "fifty-five million, nine hundred seventeen thousand, seven hundred eighty-three".