315203225 has 12 divisors (see below), whose sum is σ = 391797840. Its totient is φ = 251552400.

The previous prime is 315203221. The next prime is 315203227. The reversal of 315203225 is 522302513.

It is not a de Polignac number, because 315203225 - 2² = 315203221 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 315203225.

It is not an unprimeable number, because it can be changed into a prime (315203221) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4571 + ... + 25520.

It is an arithmetic number, because the mean of its divisors is an integer number (32649820).

Almost surely, 2^315203225 is an apocalyptic number.

It is an amenable number.

315203225 is a deficient number, since it is larger than the sum of its proper divisors (76594615).

315203225 is a wasteful number, since it uses less digits than its factorization.

315203225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30520 (or 30515 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 23.

The square root of 315203225 is about 17753.9636419589. The cubic root of 315203225 is about 680.5555041202. Note that the first 4 decimals are identical.

Adding to 315203225 its reverse (522302513), we get a palindrome (837505738).

The spelling of 315203225 in words is "three hundred fifteen million, two hundred three thousand, two hundred twenty-five".