55433219 has 4 divisors (see below), whose sum is σ = 55460544. Its totient is φ = 55405896.

The previous prime is 55433171. The next prime is 55433221. The reversal of 55433219 is 91233455.

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 55433219 - 2¹² = 55429123 is a prime.

It is a super-2 number, since 2×55433219² = 6145683537403922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55432219) 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, 10352 + ... + 14765.

It is an arithmetic number, because the mean of its divisors is an integer number (13865136).

Almost surely, 2^55433219 is an apocalyptic number.

55433219 is a deficient number, since it is larger than the sum of its proper divisors (27325).

55433219 is a wasteful number, since it uses less digits than its factorization.

55433219 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27324.

The product of its digits is 16200, while the sum is 32.

The square root of 55433219 is about 7445.3488165431. The cubic root of 55433219 is about 381.2911275528.

The spelling of 55433219 in words is "fifty-five million, four hundred thirty-three thousand, two hundred nineteen".