55439219 has 8 divisors (see below), whose sum is σ = 61620912. Its totient is φ = 49447840.

The previous prime is 55439101. The next prime is 55439221. The reversal of 55439219 is 91293455.

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

It is a cyclic number.

It is not a de Polignac number, because 55439219 - 2¹² = 55435123 is a prime.

It is a super-2 number, since 2×55439219² = 6147014006659922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55439239) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 46964 + ... + 48129.

It is an arithmetic number, because the mean of its divisors is an integer number (7702614).

Almost surely, 2^55439219 is an apocalyptic number.

55439219 is a deficient number, since it is larger than the sum of its proper divisors (6181693).

55439219 is a wasteful number, since it uses less digits than its factorization.

55439219 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95157.

The product of its digits is 48600, while the sum is 38.

The square root of 55439219 is about 7445.7517417652. The cubic root of 55439219 is about 381.3048838303.

The spelling of 55439219 in words is "fifty-five million, four hundred thirty-nine thousand, two hundred nineteen".