55171197 has 6 divisors (see below), whose sum is σ = 79691742. Its totient is φ = 36780792.

The previous prime is 55171177. The next prime is 55171211. The reversal of 55171197 is 79117155.

55171197 is a `hidden beast` number, since 551 + 7 + 11 + 97 = 666.

It can be written as a sum of positive squares in only one way, i.e., 38081241 + 17089956 = 6171^2 + 4134^2 .

It is not a de Polignac number, because 55171197 - 2¹⁸ = 54909053 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55171147) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3065058 + ... + 3065075.

It is an arithmetic number, because the mean of its divisors is an integer number (13281957).

Almost surely, 2^55171197 is an apocalyptic number.

It is an amenable number.

55171197 is a deficient number, since it is larger than the sum of its proper divisors (24520545).

55171197 is a wasteful number, since it uses less digits than its factorization.

55171197 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6130139 (or 6130136 counting only the distinct ones).

The product of its digits is 11025, while the sum is 36.

The square root of 55171197 is about 7427.7316187380. The cubic root of 55171197 is about 380.6894155986.

The spelling of 55171197 in words is "fifty-five million, one hundred seventy-one thousand, one hundred ninety-seven".