404222566225 has 9 divisors (see below), whose sum is σ = 501239924017. Its totient is φ = 323375509840.

The previous prime is 404222566183. The next prime is 404222566261. The reversal of 404222566225 is 522665222404.

The square root of 404222566225 is 635785.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 45977222929 + 358245343296 = 214423^2 + 598536^2 .

It is not a de Polignac number, because 404222566225 - 2²¹ = 404220469073 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 3115347 + ... + 3242503.

Almost surely, 2^404222566225 is an apocalyptic number.

404222566225 is the 635785-th square number.

404222566225 is the 317893-rd centered octagonal number.

It is an amenable number.

404222566225 is a deficient number, since it is larger than the sum of its proper divisors (97017357792).

404222566225 is an frugal number, since it uses more digits than its factorization.

404222566225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 254324 (or 127162 counting only the distinct ones).

The product of its (nonzero) digits is 460800, while the sum is 40.

Adding to 404222566225 its reverse (522665222404), we get a palindrome (926887788629).

The spelling of 404222566225 in words is "four hundred four billion, two hundred twenty-two million, five hundred sixty-six thousand, two hundred twenty-five".