3117212281 has 8 divisors (see below), whose sum is σ = 3123689984. Its totient is φ = 3110743440.

The previous prime is 3117212269. The next prime is 3117212299. The reversal of 3117212281 is 1822127113.

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

It is a cyclic number.

It is not a de Polignac number, because 3117212281 - 2¹⁹ = 3116687993 is a prime.

It is a super-2 number, since 2×3117212281² = 19434024809634445922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3117212221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1783450 + ... + 1785196.

It is an arithmetic number, because the mean of its divisors is an integer number (390461248).

Almost surely, 2^3117212281 is an apocalyptic number.

It is an amenable number.

3117212281 is a deficient number, since it is larger than the sum of its proper divisors (6477703).

3117212281 is a wasteful number, since it uses less digits than its factorization.

3117212281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4431.

The product of its digits is 1344, while the sum is 28.

The square root of 3117212281 is about 55832.0005104599. Note that the first 3 decimals coincide. The cubic root of 3117212281 is about 1460.7933826676.

Adding to 3117212281 its reverse (1822127113), we get a palindrome (4939339394).

The spelling of 3117212281 in words is "three billion, one hundred seventeen million, two hundred twelve thousand, two hundred eighty-one".