55471771 has 4 divisors (see below), whose sum is σ = 55512072. Its totient is φ = 55431472.

The previous prime is 55471747. The next prime is 55471777. The reversal of 55471771 is 17717455.

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 55471771 - 2⁵ = 55471739 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 55471771.

It is not an unprimeable number, because it can be changed into a prime (55471777) 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, 18010 + ... + 20863.

It is an arithmetic number, because the mean of its divisors is an integer number (13878018).

Almost surely, 2^55471771 is an apocalyptic number.

55471771 is a deficient number, since it is larger than the sum of its proper divisors (40301).

55471771 is a wasteful number, since it uses less digits than its factorization.

55471771 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40300.

The product of its digits is 34300, while the sum is 37.

The square root of 55471771 is about 7447.9373654724. The cubic root of 55471771 is about 381.3794989268.

The spelling of 55471771 in words is "fifty-five million, four hundred seventy-one thousand, seven hundred seventy-one".