522780145 has 4 divisors (see below), whose sum is σ = 627336180. Its totient is φ = 418224112.

The previous prime is 522780143. The next prime is 522780173. The reversal of 522780145 is 541087225.

It is a happy number.

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 284664384 + 238115761 = 16872^2 + 15431^2 .

It is a cyclic number.

It is not a de Polignac number, because 522780145 - 2¹ = 522780143 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 522780145.

It is not an unprimeable number, because it can be changed into a prime (522780143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 52278010 + ... + 52278019.

It is an arithmetic number, because the mean of its divisors is an integer number (156834045).

Almost surely, 2^522780145 is an apocalyptic number.

It is an amenable number.

522780145 is a deficient number, since it is larger than the sum of its proper divisors (104556035).

522780145 is a wasteful number, since it uses less digits than its factorization.

522780145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104556034.

The product of its (nonzero) digits is 22400, while the sum is 34.

The square root of 522780145 is about 22864.3859528307. The cubic root of 522780145 is about 805.5757079241.

The spelling of 522780145 in words is "five hundred twenty-two million, seven hundred eighty thousand, one hundred forty-five".