3261809231 has 2 divisors, whose sum is σ = 3261809232. Its totient is φ = 3261809230.

The previous prime is 3261809219. The next prime is 3261809311. The reversal of 3261809231 is 1329081623.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 3261809231 - 2³⁰ = 2188067407 is a prime.

It is a super-2 number, since 2×3261809231² = 21278798918873622722, which contains 22 as substring.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 3261809191 and 3261809200.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3261805231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1630904615 + 1630904616.

It is an arithmetic number, because the mean of its divisors is an integer number (1630904616).

Almost surely, 2^3261809231 is an apocalyptic number.

3261809231 is a deficient number, since it is larger than the sum of its proper divisors (1).

3261809231 is an equidigital number, since it uses as much as digits as its factorization.

3261809231 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15552, while the sum is 35.

The square root of 3261809231 is about 57112.2511463171. The cubic root of 3261809231 is about 1483.0399578980.

The spelling of 3261809231 in words is "three billion, two hundred sixty-one million, eight hundred nine thousand, two hundred thirty-one".