3287240281 has 4 divisors (see below), whose sum is σ = 3540104932. Its totient is φ = 3034375632.

The previous prime is 3287240251. The next prime is 3287240287. The reversal of 3287240281 is 1820427823.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1820427823 = 32971 ⋅55213.

It can be written as a sum of positive squares in 2 ways, for example, as 2219257881 + 1067982400 = 47109^2 + 32680^2 .

It is a cyclic number.

It is not a de Polignac number, because 3287240281 - 2⁷ = 3287240153 is a prime.

It is a super-2 number, since 2×3287240281² = 21611897330057917922, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 3287240281.

It is not an unprimeable number, because it can be changed into a prime (3287240287) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 126432306 + ... + 126432331.

It is an arithmetic number, because the mean of its divisors is an integer number (885026233).

Almost surely, 2^3287240281 is an apocalyptic number.

It is an amenable number.

3287240281 is a deficient number, since it is larger than the sum of its proper divisors (252864651).

3287240281 is a wasteful number, since it uses less digits than its factorization.

3287240281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 252864650.

The product of its (nonzero) digits is 43008, while the sum is 37.

The square root of 3287240281 is about 57334.4598038562. The cubic root of 3287240281 is about 1486.8842118043.

It can be divided in two parts, 32872 and 40281, that added together give a triangular number (73153 = T₃₈₂).

The spelling of 3287240281 in words is "three billion, two hundred eighty-seven million, two hundred forty thousand, two hundred eighty-one".