55308239 has 8 divisors (see below), whose sum is σ = 63665280. Its totient is φ = 47065176.

The previous prime is 55308233. The next prime is 55308241. The reversal of 55308239 is 93280355.

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 55308239 - 2⁴ = 55308223 is a prime.

It is a super-2 number, since 2×55308239² = 6118002602562242, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 55308199 and 55308208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55308233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27449 + ... + 29394.

It is an arithmetic number, because the mean of its divisors is an integer number (7958160).

Almost surely, 2^55308239 is an apocalyptic number.

55308239 is a deficient number, since it is larger than the sum of its proper divisors (8357041).

55308239 is a wasteful number, since it uses less digits than its factorization.

55308239 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56989.

The product of its (nonzero) digits is 32400, while the sum is 35.

The square root of 55308239 is about 7436.9509209084. The cubic root of 55308239 is about 381.0043583292.

The spelling of 55308239 in words is "fifty-five million, three hundred eight thousand, two hundred thirty-nine".