3221430402520 has 128 divisors (see below), whose sum is σ = 7989780098880. Its totient is φ = 1159200000000.

The previous prime is 3221430402497. The next prime is 3221430402643. The reversal of 3221430402520 is 252040341223.

It is a super-2 number, since 2×3221430402520² (a number of 26 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 85883770 + ... + 85921270.

Almost surely, 2^{3221430402520} 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 3221430402520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3994890049440).

3221430402520 is an abundant number, since it is smaller than the sum of its proper divisors (4768349696360).

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

3221430402520 is a wasteful number, since it uses less digits than its factorization.

3221430402520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39557 (or 39553 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 28.

Adding to 3221430402520 its reverse (252040341223), we get a palindrome (3473470743743).

The spelling of 3221430402520 in words is "three trillion, two hundred twenty-one billion, four hundred thirty million, four hundred two thousand, five hundred twenty".