36315281 has 4 divisors (see below), whose sum is σ = 38451492. Its totient is φ = 34179072.

The previous prime is 36315197. The next prime is 36315283. The reversal of 36315281 is 18251363.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 18251363 = 13 ⋅1403951.

It can be written as a sum of positive squares in 2 ways, for example, as 31820881 + 4494400 = 5641^2 + 2120^2 .

It is a cyclic number.

It is not a de Polignac number, because 36315281 - 2¹⁸ = 36053137 is a prime.

It is a super-2 number, since 2×36315281² = 2637599268217922, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (36315283) 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, 1068080 + ... + 1068113.

It is an arithmetic number, because the mean of its divisors is an integer number (9612873).

Almost surely, 2^36315281 is an apocalyptic number.

It is an amenable number.

36315281 is a deficient number, since it is larger than the sum of its proper divisors (2136211).

36315281 is a wasteful number, since it uses less digits than its factorization.

36315281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2136210.

The product of its digits is 4320, while the sum is 29.

The square root of 36315281 is about 6026.2161428213. The cubic root of 36315281 is about 331.1538457831.

The spelling of 36315281 in words is "thirty-six million, three hundred fifteen thousand, two hundred eighty-one".