55566019 has 8 divisors (see below), whose sum is σ = 57001472. Its totient is φ = 54137160.

The previous prime is 55566011. The next prime is 55566031. The reversal of 55566019 is 91066555.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 55566019 - 2³ = 55566011 is a prime.

It is a super-2 number, since 2×55566019² = 6175164935016722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55566011) 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 7 ways as a sum of consecutive naturals, for example, 18514 + ... + 21304.

It is an arithmetic number, because the mean of its divisors is an integer number (7125184).

Almost surely, 2^55566019 is an apocalyptic number.

55566019 is a deficient number, since it is larger than the sum of its proper divisors (1435453).

55566019 is a wasteful number, since it uses less digits than its factorization.

55566019 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3297.

The product of its (nonzero) digits is 40500, while the sum is 37.

The square root of 55566019 is about 7454.2618011444. The cubic root of 55566019 is about 381.5953679884.

The spelling of 55566019 in words is "fifty-five million, five hundred sixty-six thousand, nineteen".