522778 has 4 divisors (see below), whose sum is σ = 784170. Its totient is φ = 261388.

The previous prime is 522763. The next prime is 522787. The reversal of 522778 is 877225.

522778 is digitally balanced in base 3, 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 only one way, i.e., 522729 + 49 = 723^2 + 7^2 .

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 130693 + ... + 130696.

2⁵²²⁷⁷⁸ is an apocalyptic number.

522778 is a deficient number, since it is larger than the sum of its proper divisors (261392).

522778 is a wasteful number, since it uses less digits than its factorization.

522778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 261391.

The product of its digits is 7840, while the sum is 31.

The square root of 522778 is about 723.0338857896. The cubic root of 522778 is about 80.5574606147.

The spelling of 522778 in words is "five hundred twenty-two thousand, seven hundred seventy-eight".