55474857 has 12 divisors (see below), whose sum is σ = 81031860. Its totient is φ = 36567168.

The previous prime is 55474849. The next prime is 55474879. The reversal of 55474857 is 75847455.

55474857 is a `hidden beast` number, since 554 + 7 + 48 + 57 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 27342441 + 28132416 = 5229^2 + 5304^2 .

It is not a de Polignac number, because 55474857 - 2³ = 55474849 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55474807) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 33828 + ... + 35429.

It is an arithmetic number, because the mean of its divisors is an integer number (6752655).

Almost surely, 2^55474857 is an apocalyptic number.

It is an amenable number.

55474857 is a deficient number, since it is larger than the sum of its proper divisors (25557003).

55474857 is a wasteful number, since it uses less digits than its factorization.

55474857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69352 (or 69349 counting only the distinct ones).

The product of its digits is 784000, while the sum is 45.

The square root of 55474857 is about 7448.1445340434. The cubic root of 55474857 is about 381.3865710843.

It can be divided in two parts, 5547 and 4857, that added together give a square (10404 = 102²).

The spelling of 55474857 in words is "fifty-five million, four hundred seventy-four thousand, eight hundred fifty-seven".