3217778313 has 4 divisors (see below), whose sum is σ = 4290371088. Its totient is φ = 2145185540.

The previous prime is 3217778303. The next prime is 3217778323. The reversal of 3217778313 is 3138777123.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 3138777123 = 3 ⋅1046259041.

It is an interprime number because it is at equal distance from previous prime (3217778303) and next prime (3217778323).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3217778313 is a prime.

It is a super-2 number, since 2×3217778313² = 20708194543226251938, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (3217778303) 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 3 ways as a sum of consecutive naturals, for example, 536296383 + ... + 536296388.

It is an arithmetic number, because the mean of its divisors is an integer number (1072592772).

Almost surely, 2^3217778313 is an apocalyptic number.

It is an amenable number.

3217778313 is a deficient number, since it is larger than the sum of its proper divisors (1072592775).

3217778313 is a wasteful number, since it uses less digits than its factorization.

3217778313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1072592774.

The product of its digits is 148176, while the sum is 42.

The square root of 3217778313 is about 56725.4644141412. The cubic root of 3217778313 is about 1476.3365555305.

The spelling of 3217778313 in words is "three billion, two hundred seventeen million, seven hundred seventy-eight thousand, three hundred thirteen".