55105727 has 4 divisors (see below), whose sum is σ = 55881936. Its totient is φ = 54329520.

The previous prime is 55105717. The next prime is 55105733. The reversal of 55105727 is 72750155.

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 55105727 - 2⁶ = 55105663 is a prime.

It is a super-2 number, since 2×55105727² = 6073282296397058, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 55105693 and 55105702.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55105717) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 387998 + ... + 388139.

It is an arithmetic number, because the mean of its divisors is an integer number (13970484).

Almost surely, 2^55105727 is an apocalyptic number.

55105727 is a deficient number, since it is larger than the sum of its proper divisors (776209).

55105727 is an equidigital number, since it uses as much as digits as its factorization.

55105727 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 776208.

The product of its (nonzero) digits is 12250, while the sum is 32.

The square root of 55105727 is about 7423.3231776611. The cubic root of 55105727 is about 380.5387717684.

The spelling of 55105727 in words is "fifty-five million, one hundred five thousand, seven hundred twenty-seven".