55171206 has 48 divisors (see below), whose sum is σ = 126064848. Its totient is φ = 18079200.

The previous prime is 55171177. The next prime is 55171211. The reversal of 55171206 is 60217155.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 55171206.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 28716 + ... + 30576.

It is an arithmetic number, because the mean of its divisors is an integer number (2626351).

Almost surely, 2^55171206 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55171206, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (63032424).

55171206 is an abundant number, since it is smaller than the sum of its proper divisors (70893642).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

55171206 is a wasteful number, since it uses less digits than its factorization.

55171206 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1939 (or 1927 counting only the distinct ones).

The product of its (nonzero) digits is 2100, while the sum is 27.

The square root of 55171206 is about 7427.7322245757. The cubic root of 55171206 is about 380.6894362990.

The spelling of 55171206 in words is "fifty-five million, one hundred seventy-one thousand, two hundred six".