55340239 has 8 divisors (see below), whose sum is σ = 57513600. Its totient is φ = 53191200.

The previous prime is 55340213. The next prime is 55340249. The reversal of 55340239 is 93204355.

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 55340239 - 2¹¹ = 55338191 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 55340239.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55340249) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1372 + ... + 10609.

It is an arithmetic number, because the mean of its divisors is an integer number (7189200).

Almost surely, 2^55340239 is an apocalyptic number.

55340239 is a deficient number, since it is larger than the sum of its proper divisors (2173361).

55340239 is a wasteful number, since it uses less digits than its factorization.

55340239 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12161.

The product of its (nonzero) digits is 16200, while the sum is 31.

The square root of 55340239 is about 7439.1020291430. The cubic root of 55340239 is about 381.0778241099.

The spelling of 55340239 in words is "fifty-five million, three hundred forty thousand, two hundred thirty-nine".