55287939 has 8 divisors (see below), whose sum is σ = 84248320. Its totient is φ = 31593096.

The previous prime is 55287907. The next prime is 55287943. The reversal of 55287939 is 93978255.

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 55287939 - 2⁵ = 55287907 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55287979) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1316359 + ... + 1316400.

It is an arithmetic number, because the mean of its divisors is an integer number (10531040).

Almost surely, 2^55287939 is an apocalyptic number.

55287939 is a deficient number, since it is larger than the sum of its proper divisors (28960381).

55287939 is a wasteful number, since it uses less digits than its factorization.

55287939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2632769.

The product of its digits is 680400, while the sum is 48.

The square root of 55287939 is about 7435.5859890126. The cubic root of 55287939 is about 380.9577387835.

The spelling of 55287939 in words is "fifty-five million, two hundred eighty-seven thousand, nine hundred thirty-nine".