3261131947 has 16 divisors (see below), whose sum is σ = 3489868800. Its totient is φ = 3036641920.

The previous prime is 3261131941. The next prime is 3261131977. The reversal of 3261131947 is 7491311623.

It is a cyclic number.

It is not a de Polignac number, because 3261131947 - 2¹¹ = 3261129899 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3261131941) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 797454 + ... + 801532.

It is an arithmetic number, because the mean of its divisors is an integer number (218116800).

Almost surely, 2^3261131947 is an apocalyptic number.

3261131947 is a deficient number, since it is larger than the sum of its proper divisors (228736853).

3261131947 is a wasteful number, since it uses less digits than its factorization.

3261131947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4586.

The product of its digits is 27216, while the sum is 37.

The square root of 3261131947 is about 57106.3214276668. The cubic root of 3261131947 is about 1482.9373043610.

The spelling of 3261131947 in words is "three billion, two hundred sixty-one million, one hundred thirty-one thousand, nine hundred forty-seven".