3216521004 has 24 divisors (see below), whose sum is σ = 7513701888. Its totient is φ = 1070961360.

The previous prime is 3216520991. The next prime is 3216521027. The reversal of 3216521004 is 4001256123.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 140452 + ... + 161739.

It is an arithmetic number, because the mean of its divisors is an integer number (313070912).

Almost surely, 2^3216521004 is an apocalyptic number.

It is an amenable number.

3216521004 is an abundant number, since it is smaller than the sum of its proper divisors (4297180884).

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

3216521004 is a wasteful number, since it uses less digits than its factorization.

3216521004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 303085 (or 303083 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 3216521004 is about 56714.3809275919. The cubic root of 3216521004 is about 1476.1442434366.

Adding to 3216521004 its reverse (4001256123), we get a palindrome (7217777127).

The spelling of 3216521004 in words is "three billion, two hundred sixteen million, five hundred twenty-one thousand, four".