55806943 has 4 divisors (see below), whose sum is σ = 56513440. Its totient is φ = 55100448.

The previous prime is 55806893. The next prime is 55806977. The reversal of 55806943 is 34960855.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 55806943 - 2⁹ = 55806431 is a prime.

It is a super-2 number, since 2×55806943² = 6228829774010498, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 55806896 and 55806905.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55807943) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 353130 + ... + 353287.

It is an arithmetic number, because the mean of its divisors is an integer number (14128360).

Almost surely, 2^55806943 is an apocalyptic number.

55806943 is a deficient number, since it is larger than the sum of its proper divisors (706497).

55806943 is an equidigital number, since it uses as much as digits as its factorization.

55806943 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 706496.

The product of its (nonzero) digits is 129600, while the sum is 40.

The square root of 55806943 is about 7470.4044736547. The cubic root of 55806943 is about 382.1460818448.

The spelling of 55806943 in words is "fifty-five million, eight hundred six thousand, nine hundred forty-three".