52778045 has 4 divisors (see below), whose sum is σ = 63333660. Its totient is φ = 42222432.

The previous prime is 52778041. The next prime is 52778053. The reversal of 52778045 is 54087725.

52778045 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 22714756 + 30063289 = 4766^2 + 5483^2 .

It is a cyclic number.

It is not a de Polignac number, because 52778045 - 2² = 52778041 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52778041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5277800 + ... + 5277809.

It is an arithmetic number, because the mean of its divisors is an integer number (15833415).

Almost surely, 2^52778045 is an apocalyptic number.

It is an amenable number.

52778045 is a deficient number, since it is larger than the sum of its proper divisors (10555615).

52778045 is a wasteful number, since it uses less digits than its factorization.

52778045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10555614.

The product of its (nonzero) digits is 78400, while the sum is 38.

The square root of 52778045 is about 7264.8499640392. The cubic root of 52778045 is about 375.1034855134.

The spelling of 52778045 in words is "fifty-two million, seven hundred seventy-eight thousand, forty-five".