522226561 has 4 divisors (see below), whose sum is σ = 522272772. Its totient is φ = 522180352.

The previous prime is 522226501. The next prime is 522226567. The reversal of 522226561 is 165622225.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 79923600 + 442302961 = 8940^2 + 21031^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-522226561 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (522226567) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6441 + ... + 32953.

It is an arithmetic number, because the mean of its divisors is an integer number (130568193).

Almost surely, 2^522226561 is an apocalyptic number.

It is an amenable number.

522226561 is a deficient number, since it is larger than the sum of its proper divisors (46211).

522226561 is a wasteful number, since it uses less digits than its factorization.

522226561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46210.

The product of its digits is 14400, while the sum is 31.

The square root of 522226561 is about 22852.2769325072. The cubic root of 522226561 is about 805.2912599078.

Adding to 522226561 its reverse (165622225), we get a palindrome (687848786).

The spelling of 522226561 in words is "five hundred twenty-two million, two hundred twenty-six thousand, five hundred sixty-one".