55280199 has 16 divisors (see below), whose sum is σ = 80468192. Its totient is φ = 33550848.

The previous prime is 55280129. The next prime is 55280221. The reversal of 55280199 is 99108255.

It is not a de Polignac number, because 55280199 - 2⁹ = 55279687 is a prime.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55280129) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6862 + ... + 12555.

It is an arithmetic number, because the mean of its divisors is an integer number (5029262).

Almost surely, 2^55280199 is an apocalyptic number.

55280199 is a deficient number, since it is larger than the sum of its proper divisors (25187993).

55280199 is a wasteful number, since it uses less digits than its factorization.

55280199 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19506.

The product of its (nonzero) digits is 32400, while the sum is 39.

The square root of 55280199 is about 7435.0655007202. The cubic root of 55280199 is about 380.9399606414.

The spelling of 55280199 in words is "fifty-five million, two hundred eighty thousand, one hundred ninety-nine".