318213025 has 12 divisors (see below), whose sum is σ = 424937212. Its totient is φ = 234987840.

The previous prime is 318212977. The next prime is 318213037. The reversal of 318213025 is 520312813.

It can be written as a sum of positive squares in 6 ways, for example, as 20857489 + 297355536 = 4567^2 + 17244^2 .

It is not a de Polignac number, because 318213025 - 2⁷ = 318212897 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a Duffinian number.

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, 489234 + ... + 489883.

Almost surely, 2^318213025 is an apocalyptic number.

It is an amenable number.

318213025 is a deficient number, since it is larger than the sum of its proper divisors (106724187).

318213025 is a wasteful number, since it uses less digits than its factorization.

318213025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 979140 (or 979135 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 318213025 is about 17838.5264245677. The cubic root of 318213025 is about 682.7147995337.

Adding to 318213025 its reverse (520312813), we get a palindrome (838525838).

The spelling of 318213025 in words is "three hundred eighteen million, two hundred thirteen thousand, twenty-five".