315481 has 2 divisors, whose sum is σ = 315482. Its totient is φ = 315480.

The previous prime is 315467. The next prime is 315493. The reversal of 315481 is 184513.

315481 is nontrivially palindromic in base 2.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 234256 + 81225 = 484^2 + 285^2 .

It is a cyclic number.

It is not a de Polignac number, because 315481 - 2⁵ = 315449 is a prime.

It is a super-2 number, since 2×315481² = 199056522722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (315421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 157740 + 157741.

It is an arithmetic number, because the mean of its divisors is an integer number (157741).

2³¹⁵⁴⁸¹ is an apocalyptic number.

It is an amenable number.

315481 is a deficient number, since it is larger than the sum of its proper divisors (1).

315481 is an equidigital number, since it uses as much as digits as its factorization.

315481 is an evil number, because the sum of its binary digits is even.

The product of its digits is 480, while the sum is 22.

The square root of 315481 is about 561.6769534172. The cubic root of 315481 is about 68.0755360156.

Adding to 315481 its reverse (184513), we get a palindrome (499994).

The spelling of 315481 in words is "three hundred fifteen thousand, four hundred eighty-one".