55200779 has 4 divisors (see below), whose sum is σ = 55481184. Its totient is φ = 54920376.

The previous prime is 55200763. The next prime is 55200787. The reversal of 55200779 is 97700255.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 97700255 = 5 ⋅19540051.

It is a cyclic number.

It is not a de Polignac number, because 55200779 - 2⁴ = 55200763 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55209779) 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, 139907 + ... + 140300.

It is an arithmetic number, because the mean of its divisors is an integer number (13870296).

Almost surely, 2^55200779 is an apocalyptic number.

55200779 is a deficient number, since it is larger than the sum of its proper divisors (280405).

55200779 is a wasteful number, since it uses less digits than its factorization.

55200779 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 280404.

The product of its (nonzero) digits is 22050, while the sum is 35.

The square root of 55200779 is about 7429.7226731554. The cubic root of 55200779 is about 380.7574434993.

The spelling of 55200779 in words is "fifty-five million, two hundred thousand, seven hundred seventy-nine".