55785475 has 24 divisors (see below), whose sum is σ = 71299008. Its totient is φ = 43276800.

The previous prime is 55785403. The next prime is 55785479. The reversal of 55785475 is 57458755.

It is not a de Polignac number, because 55785475 - 2¹³ = 55777283 is a prime.

It is a super-2 number, since 2×55785475² = 6224038441951250, which contains 22 as substring.

It is a Duffinian number.

Its product of digits (980000) is a multiple of the sum of its prime divisors (490).

It is not an unprimeable number, because it can be changed into a prime (55785479) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 231355 + ... + 231595.

It is an arithmetic number, because the mean of its divisors is an integer number (2970792).

Almost surely, 2^55785475 is an apocalyptic number.

55785475 is a deficient number, since it is larger than the sum of its proper divisors (15513533).

55785475 is a wasteful number, since it uses less digits than its factorization.

55785475 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 495 (or 490 counting only the distinct ones).

The product of its digits is 980000, while the sum is 46.

The square root of 55785475 is about 7468.9674654533. The cubic root of 55785475 is about 382.0970738191.

The spelling of 55785475 in words is "fifty-five million, seven hundred eighty-five thousand, four hundred seventy-five".