55639030 has 16 divisors (see below), whose sum is σ = 105421680. Its totient is φ = 21084192.

The previous prime is 55639027. The next prime is 55639043. The reversal of 55639030 is 3093655.

It is a junction number, because it is equal to n+sod(n) for n = 55638983 and 55639001.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 146229 + ... + 146608.

It is an arithmetic number, because the mean of its divisors is an integer number (6588855).

Almost surely, 2^55639030 is an apocalyptic number.

55639030 is a deficient number, since it is larger than the sum of its proper divisors (49782650).

55639030 is a wasteful number, since it uses less digits than its factorization.

55639030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 292863.

The product of its (nonzero) digits is 12150, while the sum is 31.

The square root of 55639030 is about 7459.1574591237. The cubic root of 55639030 is about 381.7624273190.

The spelling of 55639030 in words is "fifty-five million, six hundred thirty-nine thousand, thirty".