55857843 has 10 divisors (see below), whose sum is σ = 83442084. Its totient is φ = 37238508.

The previous prime is 55857839. The next prime is 55857847. The reversal of 55857843 is 34875855.

55857843 is a `hidden beast` number, since 558 + 57 + 8 + 43 = 666.

55857843 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (55857839) and next prime (55857847).

It is not a de Polignac number, because 55857843 - 2² = 55857839 is a prime.

It is a super-2 number, since 2×55857843² = 6240197249225298, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (55857847) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 344721 + ... + 344882.

Almost surely, 2^55857843 is an apocalyptic number.

55857843 is a deficient number, since it is larger than the sum of its proper divisors (27584241).

55857843 is an equidigital number, since it uses as much as digits as its factorization.

55857843 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 689615 (or 689606 counting only the distinct ones).

The product of its digits is 672000, while the sum is 45.

The square root of 55857843 is about 7473.8104739149. The cubic root of 55857843 is about 382.2622282349.

The spelling of 55857843 in words is "fifty-five million, eight hundred fifty-seven thousand, eight hundred forty-three".