55170887 has 2 divisors, whose sum is σ = 55170888. Its totient is φ = 55170886.

The previous prime is 55170881. The next prime is 55170919. The reversal of 55170887 is 78807155.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 55170887 - 2⁶ = 55170823 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55170881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27585443 + 27585444.

It is an arithmetic number, because the mean of its divisors is an integer number (27585444).

Almost surely, 2^55170887 is an apocalyptic number.

55170887 is a deficient number, since it is larger than the sum of its proper divisors (1).

55170887 is an equidigital number, since it uses as much as digits as its factorization.

55170887 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 78400, while the sum is 41.

The square root of 55170887 is about 7427.7107509649. The cubic root of 55170887 is about 380.6887025820.

The spelling of 55170887 in words is "fifty-five million, one hundred seventy thousand, eight hundred eighty-seven".