3161946281 has 8 divisors (see below), whose sum is σ = 3488226504. Its totient is φ = 2847530880.

The previous prime is 3161946257. The next prime is 3161946283. The reversal of 3161946281 is 1826491613.

It can be written as a sum of positive squares in 4 ways, for example, as 50537881 + 3111408400 = 7109^2 + 55780^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3161946281 is a prime.

It is a super-2 number, since 2×3161946281² = 19995808567859461922, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (41).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3161946283) 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 7 ways as a sum of consecutive naturals, for example, 2965646 + ... + 2966711.

It is an arithmetic number, because the mean of its divisors is an integer number (436028313).

Almost surely, 2^3161946281 is an apocalyptic number.

It is an amenable number.

3161946281 is a deficient number, since it is larger than the sum of its proper divisors (326280223).

3161946281 is a wasteful number, since it uses less digits than its factorization.

3161946281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5932411.

The product of its digits is 62208, while the sum is 41.

The square root of 3161946281 is about 56231.1860180807. The cubic root of 3161946281 is about 1467.7479949695.

The spelling of 3161946281 in words is "three billion, one hundred sixty-one million, nine hundred forty-six thousand, two hundred eighty-one".