3217820823 has 48 divisors (see below), whose sum is σ = 5520010496. Its totient is φ = 1834980480.

The previous prime is 3217820797. The next prime is 3217820857. The reversal of 3217820823 is 3280287123.

It is a happy number.

It is not a de Polignac number, because 3217820823 - 2⁶ = 3217820759 is a prime.

It is a super-3 number, since 3×3217820823³ (a number of 29 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3217810823) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 969615 + ... + 972927.

Almost surely, 2^3217820823 is an apocalyptic number.

3217820823 is a deficient number, since it is larger than the sum of its proper divisors (2302189673).

3217820823 is an equidigital number, since it uses as much as digits as its factorization.

3217820823 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3906 (or 3894 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 36.

The square root of 3217820823 is about 56725.8391123481. The cubic root of 3217820823 is about 1476.3430567853.

The spelling of 3217820823 in words is "three billion, two hundred seventeen million, eight hundred twenty thousand, eight hundred twenty-three".