55338143 has 4 divisors (see below), whose sum is σ = 63243600. Its totient is φ = 47432688.

The previous prime is 55338139. The next prime is 55338187. The reversal of 55338143 is 34183355.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34183355 = 5 ⋅6836671.

It is a cyclic number.

It is not a de Polignac number, because 55338143 - 2² = 55338139 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55338133) 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, 3952718 + ... + 3952731.

It is an arithmetic number, because the mean of its divisors is an integer number (15810900).

Almost surely, 2^55338143 is an apocalyptic number.

55338143 is a deficient number, since it is larger than the sum of its proper divisors (7905457).

55338143 is an equidigital number, since it uses as much as digits as its factorization.

55338143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7905456.

The product of its digits is 21600, while the sum is 32.

The square root of 55338143 is about 7438.9611505909. The cubic root of 55338143 is about 381.0730129681.

The spelling of 55338143 in words is "fifty-five million, three hundred thirty-eight thousand, one hundred forty-three".