55239559 has 4 divisors (see below), whose sum is σ = 55578616. Its totient is φ = 54900504.

The previous prime is 55239529. The next prime is 55239607. The reversal of 55239559 is 95593255.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55239559 is a prime.

It is a super-3 number, since 3×55239559³ (a number of 24 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55239529) 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, 169284 + ... + 169609.

It is an arithmetic number, because the mean of its divisors is an integer number (13894654).

Almost surely, 2^55239559 is an apocalyptic number.

55239559 is a deficient number, since it is larger than the sum of its proper divisors (339057).

55239559 is a wasteful number, since it uses less digits than its factorization.

55239559 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 339056.

The product of its digits is 303750, while the sum is 43.

The square root of 55239559 is about 7432.3320028104. The cubic root of 55239559 is about 380.8465866690.

The spelling of 55239559 in words is "fifty-five million, two hundred thirty-nine thousand, five hundred fifty-nine".