55865198 has 4 divisors (see below), whose sum is σ = 83797800. Its totient is φ = 27932598.

The previous prime is 55865197. The next prime is 55865207. The reversal of 55865198 is 89156855.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55865197) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13966298 + ... + 13966301.

It is an arithmetic number, because the mean of its divisors is an integer number (20949450).

Almost surely, 2^55865198 is an apocalyptic number.

55865198 is a deficient number, since it is larger than the sum of its proper divisors (27932602).

55865198 is a wasteful number, since it uses less digits than its factorization.

55865198 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27932601.

The product of its digits is 432000, while the sum is 47.

The square root of 55865198 is about 7474.3025092647. The cubic root of 55865198 is about 382.2790054389.

It can be divided in two parts, 558 and 65198, that added together give a palindrome (65756).

The spelling of 55865198 in words is "fifty-five million, eight hundred sixty-five thousand, one hundred ninety-eight".