55516839 has 8 divisors (see below), whose sum is σ = 84597120. Its totient is φ = 31723896.

The previous prime is 55516831. The next prime is 55516919. The reversal of 55516839 is 93861555.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 55516839 - 2³ = 55516831 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 55516839.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55516831) 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, 1321809 + ... + 1321850.

It is an arithmetic number, because the mean of its divisors is an integer number (10574640).

Almost surely, 2^55516839 is an apocalyptic number.

55516839 is a deficient number, since it is larger than the sum of its proper divisors (29080281).

55516839 is a wasteful number, since it uses less digits than its factorization.

55516839 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2643669.

The product of its digits is 162000, while the sum is 42.

The square root of 55516839 is about 7450.9622868459. The cubic root of 55516839 is about 381.4827548006.

The spelling of 55516839 in words is "fifty-five million, five hundred sixteen thousand, eight hundred thirty-nine".