403221425 has 12 divisors (see below), whose sum is σ = 507038976. Its totient is φ = 318032400.

The previous prime is 403221409. The next prime is 403221431. The reversal of 403221425 is 524122304.

It is a happy number.

It is not a de Polignac number, because 403221425 - 2⁴ = 403221409 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 403221425.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 111809 + ... + 115358.

It is an arithmetic number, because the mean of its divisors is an integer number (42253248).

Almost surely, 2^403221425 is an apocalyptic number.

It is an amenable number.

403221425 is a deficient number, since it is larger than the sum of its proper divisors (103817551).

403221425 is a wasteful number, since it uses less digits than its factorization.

403221425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 227248 (or 227243 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 23.

The square root of 403221425 is about 20080.3741250008. The cubic root of 403221425 is about 738.7789853139.

Adding to 403221425 its reverse (524122304), we get a palindrome (927343729).

The spelling of 403221425 in words is "four hundred three million, two hundred twenty-one thousand, four hundred twenty-five".