55171667 has 4 divisors (see below), whose sum is σ = 56106840. Its totient is φ = 54236496.

The previous prime is 55171639. The next prime is 55171679. The reversal of 55171667 is 76617155.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 76617155 = 5 ⋅15323431.

It is a cyclic number.

It is not a de Polignac number, because 55171667 - 2¹⁸ = 54909523 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 55171667.

It is not an unprimeable number, because it can be changed into a prime (55171637) 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, 467498 + ... + 467615.

It is an arithmetic number, because the mean of its divisors is an integer number (14026710).

Almost surely, 2^55171667 is an apocalyptic number.

55171667 is a deficient number, since it is larger than the sum of its proper divisors (935173).

55171667 is an equidigital number, since it uses as much as digits as its factorization.

55171667 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 935172.

The product of its digits is 44100, while the sum is 38.

The square root of 55171667 is about 7427.7632568627. The cubic root of 55171667 is about 380.6904966187.

It can be divided in two parts, 55 and 171667, that multiplied together give a triangular number (9441685 = T₄₃₄₅).

The spelling of 55171667 in words is "fifty-five million, one hundred seventy-one thousand, six hundred sixty-seven".