55040347 has 4 divisors (see below), whose sum is σ = 56938320. Its totient is φ = 53142376.

The previous prime is 55040309. The next prime is 55040351. The reversal of 55040347 is 74304055.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55040347 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55040147) 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, 948943 + ... + 949000.

It is an arithmetic number, because the mean of its divisors is an integer number (14234580).

Almost surely, 2^55040347 is an apocalyptic number.

55040347 is a deficient number, since it is larger than the sum of its proper divisors (1897973).

55040347 is a wasteful number, since it uses less digits than its factorization.

55040347 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1897972.

The product of its (nonzero) digits is 8400, while the sum is 28.

The square root of 55040347 is about 7418.9181825924. The cubic root of 55040347 is about 380.3882159055.

The spelling of 55040347 in words is "fifty-five million, forty thousand, three hundred forty-seven".