55440271 has 4 divisors (see below), whose sum is σ = 58358200. Its totient is φ = 52522344.

The previous prime is 55440263. The next prime is 55440313. The reversal of 55440271 is 17204455.

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

It is a cyclic number.

It is not a de Polignac number, because 55440271 - 2³ = 55440263 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 (55440211) 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 3 ways as a sum of consecutive naturals, for example, 1458936 + ... + 1458973.

It is an arithmetic number, because the mean of its divisors is an integer number (14589550).

Almost surely, 2^55440271 is an apocalyptic number.

55440271 is a deficient number, since it is larger than the sum of its proper divisors (2917929).

55440271 is a wasteful number, since it uses less digits than its factorization.

55440271 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2917928.

The product of its (nonzero) digits is 5600, while the sum is 28.

The square root of 55440271 is about 7445.8223857409. The cubic root of 55440271 is about 381.3072956620.

The spelling of 55440271 in words is "fifty-five million, four hundred forty thousand, two hundred seventy-one".