55143199 has 4 divisors (see below), whose sum is σ = 55658664. Its totient is φ = 54627736.

The previous prime is 55143197. The next prime is 55143227. The reversal of 55143199 is 99134155.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 55143199 - 2¹ = 55143197 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55143197) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 257572 + ... + 257785.

It is an arithmetic number, because the mean of its divisors is an integer number (13914666).

Almost surely, 2^55143199 is an apocalyptic number.

55143199 is a deficient number, since it is larger than the sum of its proper divisors (515465).

55143199 is a wasteful number, since it uses less digits than its factorization.

55143199 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 515464.

The product of its digits is 24300, while the sum is 37.

The square root of 55143199 is about 7425.8466857322. The cubic root of 55143199 is about 380.6250079226.

The spelling of 55143199 in words is "fifty-five million, one hundred forty-three thousand, one hundred ninety-nine".