55197899 has 8 divisors (see below), whose sum is σ = 55911072. Its totient is φ = 54489600.

The previous prime is 55197871. The next prime is 55197911. The reversal of 55197899 is 99879155.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55197899 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 55197899.

It is not an unprimeable number, because it can be changed into a prime (55197809) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25067 + ... + 27179.

It is an arithmetic number, because the mean of its divisors is an integer number (6988884).

Almost surely, 2^55197899 is an apocalyptic number.

55197899 is a deficient number, since it is larger than the sum of its proper divisors (713173).

55197899 is a wasteful number, since it uses less digits than its factorization.

55197899 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2437.

The product of its digits is 1020600, while the sum is 53.

The square root of 55197899 is about 7429.5288545102. The cubic root of 55197899 is about 380.7508216090.

The spelling of 55197899 in words is "fifty-five million, one hundred ninety-seven thousand, eight hundred ninety-nine".