55257543 has 24 divisors (see below), whose sum is σ = 87934080. Its totient is φ = 33158160.

The previous prime is 55257493. The next prime is 55257551. The reversal of 55257543 is 34575255.

55257543 is a `hidden beast` number, since 552 + 57 + 54 + 3 = 666.

It is not a de Polignac number, because 55257543 - 2⁸ = 55257287 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 55257498 and 55257507.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55257583) 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, 7488 + ... + 12906.

It is an arithmetic number, because the mean of its divisors is an integer number (3663920).

Almost surely, 2^55257543 is an apocalyptic number.

55257543 is a deficient number, since it is larger than the sum of its proper divisors (32676537).

55257543 is a wasteful number, since it uses less digits than its factorization.

55257543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5539 (or 5536 counting only the distinct ones).

The product of its digits is 105000, while the sum is 36.

The square root of 55257543 is about 7433.5417534309. The cubic root of 55257543 is about 380.8879121369.

The spelling of 55257543 in words is "fifty-five million, two hundred fifty-seven thousand, five hundred forty-three".