55439329 has 16 divisors (see below), whose sum is σ = 66251520. Its totient is φ = 45794560.

The previous prime is 55439323. The next prime is 55439347. The reversal of 55439329 is 92393455.

It is a cyclic number.

It is not a de Polignac number, because 55439329 - 2¹¹ = 55437281 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 55439291 and 55439300.

It is not an unprimeable number, because it can be changed into a prime (55439323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 312 + ... + 10534.

It is an arithmetic number, because the mean of its divisors is an integer number (4140720).

Almost surely, 2^55439329 is an apocalyptic number.

It is an amenable number.

55439329 is a deficient number, since it is larger than the sum of its proper divisors (10812191).

55439329 is a wasteful number, since it uses less digits than its factorization.

55439329 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10280.

The product of its digits is 145800, while the sum is 40.

The square root of 55439329 is about 7445.7591285241. The cubic root of 55439329 is about 381.3051360194.

The spelling of 55439329 in words is "fifty-five million, four hundred thirty-nine thousand, three hundred twenty-nine".