55205777 has 8 divisors (see below), whose sum is σ = 61506432. Its totient is φ = 49118800.

The previous prime is 55205767. The next prime is 55205797. The reversal of 55205777 is 77750255.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 55205777 - 2¹² = 55201681 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 55205777.

It is not an unprimeable number, because it can be changed into a prime (55205767) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 52874 + ... + 53907.

It is an arithmetic number, because the mean of its divisors is an integer number (7688304).

Almost surely, 2^55205777 is an apocalyptic number.

It is an amenable number.

55205777 is a deficient number, since it is larger than the sum of its proper divisors (6300655).

55205777 is a wasteful number, since it uses less digits than its factorization.

55205777 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106839.

The product of its (nonzero) digits is 85750, while the sum is 38.

The square root of 55205777 is about 7430.0590172622. The cubic root of 55205777 is about 380.7689346914.

The spelling of 55205777 in words is "fifty-five million, two hundred five thousand, seven hundred seventy-seven".