3223686921 has 48 divisors (see below), whose sum is σ = 5412585024. Its totient is φ = 1691577216.

The previous prime is 3223686859. The next prime is 3223686937. The reversal of 3223686921 is 1296863223.

It is not a de Polignac number, because 3223686921 - 2⁹ = 3223686409 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3223686941) 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, 372186 + ... + 380748.

It is an arithmetic number, because the mean of its divisors is an integer number (112762188).

Almost surely, 2^3223686921 is an apocalyptic number.

It is an amenable number.

3223686921 is a deficient number, since it is larger than the sum of its proper divisors (2188898103).

3223686921 is a wasteful number, since it uses less digits than its factorization.

3223686921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8790 (or 8783 counting only the distinct ones).

The product of its digits is 186624, while the sum is 42.

The square root of 3223686921 is about 56777.5212650218. The cubic root of 3223686921 is about 1477.2396382735.

The spelling of 3223686921 in words is "three billion, two hundred twenty-three million, six hundred eighty-six thousand, nine hundred twenty-one".