55577771 has 4 divisors (see below), whose sum is σ = 56488944. Its totient is φ = 54666600.

The previous prime is 55577719. The next prime is 55577789. The reversal of 55577771 is 17777555.

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-55577771 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55577701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 455495 + ... + 455616.

It is an arithmetic number, because the mean of its divisors is an integer number (14122236).

Almost surely, 2^55577771 is an apocalyptic number.

55577771 is a deficient number, since it is larger than the sum of its proper divisors (911173).

55577771 is an equidigital number, since it uses as much as digits as its factorization.

55577771 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 911172.

The product of its digits is 300125, while the sum is 44.

The square root of 55577771 is about 7455.0500333666. The cubic root of 55577771 is about 381.6222680779.

The spelling of 55577771 in words is "fifty-five million, five hundred seventy-seven thousand, seven hundred seventy-one".