2315281 has 4 divisors (see below), whose sum is σ = 2451492. Its totient is φ = 2179072.

The previous prime is 2315263. The next prime is 2315317. The reversal of 2315281 is 1825132.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 839056 + 1476225 = 916^2 + 1215^2 .

It is a cyclic number.

It is not a de Polignac number, because 2315281 - 2⁹ = 2314769 is a prime.

It is a super-3 number, since 3×2315281³ = 37233372750243999123, which contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2315231) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 68080 + ... + 68113.

It is an arithmetic number, because the mean of its divisors is an integer number (612873).

2^2315281 is an apocalyptic number.

It is an amenable number.

2315281 is a deficient number, since it is larger than the sum of its proper divisors (136211).

2315281 is a wasteful number, since it uses less digits than its factorization.

2315281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136210.

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

The square root of 2315281 is about 1521.6047449979. The cubic root of 2315281 is about 132.2923006755.

The spelling of 2315281 in words is "two million, three hundred fifteen thousand, two hundred eighty-one".