403215025 has 6 divisors (see below), whose sum is σ = 499986662. Its totient is φ = 322572000.

The previous prime is 403215023. The next prime is 403215077. The reversal of 403215025 is 520512304.

It can be written as a sum of positive squares in 3 ways, for example, as 30107169 + 373107856 = 5487^2 + 19316^2 .

It is not a de Polignac number, because 403215025 - 2¹ = 403215023 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 403214987 and 403215005.

It is not an unprimeable number, because it can be changed into a prime (403215023) 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, 8064276 + ... + 8064325.

Almost surely, 2^403215025 is an apocalyptic number.

It is an amenable number.

403215025 is a deficient number, since it is larger than the sum of its proper divisors (96771637).

403215025 is a wasteful number, since it uses less digits than its factorization.

403215025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16128611 (or 16128606 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 22.

The square root of 403215025 is about 20080.2147647878. The cubic root of 403215025 is about 738.7750766174.

Adding to 403215025 its reverse (520512304), we get a palindrome (923727329).

The spelling of 403215025 in words is "four hundred three million, two hundred fifteen thousand, twenty-five".