55040687 has 8 divisors (see below), whose sum is σ = 60280080. Its totient is φ = 49944960.

The previous prime is 55040677. The next prime is 55040723. The reversal of 55040687 is 78604055.

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

It is not a de Polignac number, because 55040687 - 2¹² = 55036591 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55040677) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35114 + ... + 36647.

It is an arithmetic number, because the mean of its divisors is an integer number (7535010).

Almost surely, 2^55040687 is an apocalyptic number.

55040687 is a deficient number, since it is larger than the sum of its proper divisors (5239393).

55040687 is a wasteful number, since it uses less digits than its factorization.

55040687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71833.

The product of its (nonzero) digits is 33600, while the sum is 35.

The square root of 55040687 is about 7418.9410969491. The cubic root of 55040687 is about 380.3889991596.

The spelling of 55040687 in words is "fifty-five million, forty thousand, six hundred eighty-seven".