3161661217 has 16 divisors (see below), whose sum is σ = 3719358720. Its totient is φ = 2649600000.

The previous prime is 3161661197. The next prime is 3161661233. The reversal of 3161661217 is 7121661613.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3161661217 is a prime.

It is a super-2 number, since 2×3161661217² = 19992203302163842178, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (3161661017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 95592 + ... + 124342.

It is an arithmetic number, because the mean of its divisors is an integer number (232459920).

Almost surely, 2^3161661217 is an apocalyptic number.

It is an amenable number.

3161661217 is a deficient number, since it is larger than the sum of its proper divisors (557697503).

3161661217 is a wasteful number, since it uses less digits than its factorization.

3161661217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29544.

The product of its digits is 9072, while the sum is 34.

The square root of 3161661217 is about 56228.6512109263. The cubic root of 3161661217 is about 1467.7038855664.

The spelling of 3161661217 in words is "three billion, one hundred sixty-one million, six hundred sixty-one thousand, two hundred seventeen".