55782117 has 24 divisors (see below), whose sum is σ = 85610304. Its totient is φ = 34879104.

The previous prime is 55782071. The next prime is 55782127. The reversal of 55782117 is 71128755.

It is not a de Polignac number, because 55782117 - 2⁶ = 55782053 is a prime.

It is a super-2 number, since 2×55782117² = 6223289154003378, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55782127) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 67368 + ... + 68190.

It is an arithmetic number, because the mean of its divisors is an integer number (3567096).

Almost surely, 2^55782117 is an apocalyptic number.

It is an amenable number.

55782117 is a deficient number, since it is larger than the sum of its proper divisors (29828187).

55782117 is a wasteful number, since it uses less digits than its factorization.

55782117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1289 (or 1286 counting only the distinct ones).

The product of its digits is 19600, while the sum is 36.

The square root of 55782117 is about 7468.7426652684. The cubic root of 55782117 is about 382.0894069027.

The spelling of 55782117 in words is "fifty-five million, seven hundred eighty-two thousand, one hundred seventeen".