55170019 has 2 divisors, whose sum is σ = 55170020. Its totient is φ = 55170018.

The previous prime is 55170013. The next prime is 55170029. The reversal of 55170019 is 91007155.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 55170019 - 2¹¹ = 55167971 is a prime.

It is a super-5 number, since 5×55170019⁵ (a number of 40 digits) contains 55555 as substring. Note that it is a super-d number also for d = 2.

It is not a weakly prime, because it can be changed into another prime (55170013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27585009 + 27585010.

It is an arithmetic number, because the mean of its divisors is an integer number (27585010).

Almost surely, 2^55170019 is an apocalyptic number.

55170019 is a deficient number, since it is larger than the sum of its proper divisors (1).

55170019 is an equidigital number, since it uses as much as digits as its factorization.

55170019 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1575, while the sum is 28.

The square root of 55170019 is about 7427.6523208885. The cubic root of 55170019 is about 380.6867061213.

The spelling of 55170019 in words is "fifty-five million, one hundred seventy thousand, nineteen".