2648231281 has 4 divisors (see below), whose sum is σ = 2648362612. Its totient is φ = 2648099952.

The previous prime is 2648231279. The next prime is 2648231291. The reversal of 2648231281 is 1821328462.

It is a happy number.

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 800607025 + 1847624256 = 28295^2 + 42984^2 .

It is a cyclic number.

It is not a de Polignac number, because 2648231281 - 2¹ = 2648231279 is a prime.

It is a super-2 number, since 2×2648231281² = 14026257835333801922, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2648231281.

It is not an unprimeable number, because it can be changed into a prime (2648231291) 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, 28350 + ... + 78103.

It is an arithmetic number, because the mean of its divisors is an integer number (662090653).

Almost surely, 2^2648231281 is an apocalyptic number.

It is an amenable number.

2648231281 is a deficient number, since it is larger than the sum of its proper divisors (131331).

2648231281 is a wasteful number, since it uses less digits than its factorization.

2648231281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131330.

The product of its digits is 36864, while the sum is 37.

The square root of 2648231281 is about 51460.9685198404. The cubic root of 2648231281 is about 1383.5195606578.

The spelling of 2648231281 in words is "two billion, six hundred forty-eight million, two hundred thirty-one thousand, two hundred eighty-one".