3221400424 has 96 divisors (see below), whose sum is σ = 6967114560. Its totient is φ = 1392680960.

The previous prime is 3221400373. The next prime is 3221400437. The reversal of 3221400424 is 4240041223.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a junction number, because it is equal to n+sod(n) for n = 3221400395 and 3221400404.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5721567 + ... + 5722129.

It is an arithmetic number, because the mean of its divisors is an integer number (72574110).

Almost surely, 2^3221400424 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3221400424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3483557280).

3221400424 is an abundant number, since it is smaller than the sum of its proper divisors (3745714136).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3221400424 is a wasteful number, since it uses less digits than its factorization.

3221400424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 871 (or 856 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 22.

The square root of 3221400424 is about 56757.3821101714. The cubic root of 3221400424 is about 1476.8902967712.

Adding to 3221400424 its reverse (4240041223), we get a palindrome (7461441647).

The spelling of 3221400424 in words is "three billion, two hundred twenty-one million, four hundred thousand, four hundred twenty-four".