402212225 has 6 divisors (see below), whose sum is σ = 498743190. Its totient is φ = 321769760.

The previous prime is 402212221. The next prime is 402212243. The reversal of 402212225 is 522212204.

It can be written as a sum of positive squares in 3 ways, for example, as 891136 + 401321089 = 944^2 + 20033^2 .

It is not a de Polignac number, because 402212225 - 2² = 402212221 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 402212197 and 402212206.

It is not an unprimeable number, because it can be changed into a prime (402212221) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 8044220 + ... + 8044269.

It is an arithmetic number, because the mean of its divisors is an integer number (83123865).

Almost surely, 2^402212225 is an apocalyptic number.

It is an amenable number.

402212225 is a deficient number, since it is larger than the sum of its proper divisors (96530965).

402212225 is a wasteful number, since it uses less digits than its factorization.

402212225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16088499 (or 16088494 counting only the distinct ones).

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

The square root of 402212225 is about 20055.2293679230. The cubic root of 402212225 is about 738.1621210703.

Adding to 402212225 its reverse (522212204), we get a palindrome (924424429).

The spelling of 402212225 in words is "four hundred two million, two hundred twelve thousand, two hundred twenty-five".