55538539 has 8 divisors (see below), whose sum is σ = 66813440. Its totient is φ = 45098856.

The previous prime is 55538531. The next prime is 55538563. The reversal of 55538539 is 93583555.

It is a happy number.

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

It is not a de Polignac number, because 55538539 - 2³ = 55538531 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 55538495 and 55538504.

It is not an unprimeable number, because it can be changed into a prime (55538531) 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 7 ways as a sum of consecutive naturals, for example, 208659 + ... + 208924.

It is an arithmetic number, because the mean of its divisors is an integer number (8351680).

Almost surely, 2^55538539 is an apocalyptic number.

55538539 is a deficient number, since it is larger than the sum of its proper divisors (11274901).

55538539 is a wasteful number, since it uses less digits than its factorization.

55538539 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 417609.

The product of its digits is 405000, while the sum is 43.

The square root of 55538539 is about 7452.4183323268. The cubic root of 55538539 is about 381.5324520192.

The spelling of 55538539 in words is "fifty-five million, five hundred thirty-eight thousand, five hundred thirty-nine".