55455543 has 64 divisors (see below), whose sum is σ = 98703360. Its totient is φ = 30326400.

The previous prime is 55455539. The next prime is 55455557. The reversal of 55455543 is 34555455.

55455543 is a `hidden beast` number, since 554 + 55 + 54 + 3 = 666.

It is not a de Polignac number, because 55455543 - 2² = 55455539 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 55455498 and 55455507.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55455583) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 204498 + ... + 204768.

It is an arithmetic number, because the mean of its divisors is an integer number (1542240).

Almost surely, 2^55455543 is an apocalyptic number.

55455543 is a gapful number since it is divisible by the number (53) formed by its first and last digit.

55455543 is a deficient number, since it is larger than the sum of its proper divisors (43247817).

55455543 is a wasteful number, since it uses less digits than its factorization.

55455543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 357 (or 351 counting only the distinct ones).

The product of its digits is 150000, while the sum is 36.

The square root of 55455543 is about 7446.8478566438. The cubic root of 55455543 is about 381.3423050531.

The spelling of 55455543 in words is "fifty-five million, four hundred fifty-five thousand, five hundred forty-three".