522240401 has 4 divisors (see below), whose sum is σ = 522704100. Its totient is φ = 521776704.

The previous prime is 522240379. The next prime is 522240409. The reversal of 522240401 is 104042225.

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 327610000 + 194630401 = 18100^2 + 13951^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-522240401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (522240409) 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, 230156 + ... + 232413.

It is an arithmetic number, because the mean of its divisors is an integer number (130676025).

Almost surely, 2^522240401 is an apocalyptic number.

It is an amenable number.

522240401 is a deficient number, since it is larger than the sum of its proper divisors (463699).

522240401 is a wasteful number, since it uses less digits than its factorization.

522240401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 463698.

The product of its (nonzero) digits is 640, while the sum is 20.

The square root of 522240401 is about 22852.5797449653. The cubic root of 522240401 is about 805.2983737631.

Adding to 522240401 its reverse (104042225), we get a palindrome (626282626).

The spelling of 522240401 in words is "five hundred twenty-two million, two hundred forty thousand, four hundred one".