55052778 has 16 divisors (see below), whose sum is σ = 120115296. Its totient is φ = 16682640.

The previous prime is 55052773. The next prime is 55052813. The reversal of 55052778 is 87725055.

It is not an unprimeable number, because it can be changed into a prime (55052773) 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 7 ways as a sum of consecutive naturals, for example, 417001 + ... + 417132.

It is an arithmetic number, because the mean of its divisors is an integer number (7507206).

Almost surely, 2^55052778 is an apocalyptic number.

55052778 is an abundant number, since it is smaller than the sum of its proper divisors (65062518).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

55052778 is a wasteful number, since it uses less digits than its factorization.

55052778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 834149.

The product of its (nonzero) digits is 98000, while the sum is 39.

The square root of 55052778 is about 7419.7559259048. The cubic root of 55052778 is about 380.4168509598.

The spelling of 55052778 in words is "fifty-five million, fifty-two thousand, seven hundred seventy-eight".