315081 has 12 divisors (see below), whose sum is σ = 490308. Its totient is φ = 193824.

The previous prime is 315067. The next prime is 315083. The reversal of 315081 is 180513.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 84681 + 230400 = 291^2 + 480^2 .

It is not a de Polignac number, because 315081 - 2⁷ = 314953 is a prime.

It is a super-2 number, since 2×315081² = 198552073122, which contains 22 as substring.

It is a Curzon number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 315081.

It is not an unprimeable number, because it can be changed into a prime (315083) 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, 1230 + ... + 1463.

It is an arithmetic number, because the mean of its divisors is an integer number (40859).

2³¹⁵⁰⁸¹ is an apocalyptic number.

It is an amenable number.

315081 is a deficient number, since it is larger than the sum of its proper divisors (175227).

315081 is a wasteful number, since it uses less digits than its factorization.

315081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2712 (or 2709 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 18.

The square root of 315081 is about 561.3207639131. The cubic root of 315081 is about 68.0467527387.

Adding to 315081 its reverse (180513), we get a palindrome (495594).

The spelling of 315081 in words is "three hundred fifteen thousand, eighty-one".