3521214424 has 128 divisors (see below), whose sum is σ = 8334627840. Its totient is φ = 1357604352.

The previous prime is 3521214421. The next prime is 3521214427. The reversal of 3521214424 is 4244121253.

It is an interprime number because it is at equal distance from previous prime (3521214421) and next prime (3521214427).

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a junction number, because it is equal to n+sod(n) for n = 3521214392 and 3521214401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3521214421) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10147419 + ... + 10147765.

It is an arithmetic number, because the mean of its divisors is an integer number (65114280).

Almost surely, 2^3521214424 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 3521214424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4167313920).

3521214424 is an abundant number, since it is smaller than the sum of its proper divisors (4813413416).

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

3521214424 is a wasteful number, since it uses less digits than its factorization.

3521214424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 689 (or 685 counting only the distinct ones).

The product of its digits is 7680, while the sum is 28.

The square root of 3521214424 is about 59339.8215703418. The cubic root of 3521214424 is about 1521.3559034604.

Adding to 3521214424 its reverse (4244121253), we get a palindrome (7765335677).

The spelling of 3521214424 in words is "three billion, five hundred twenty-one million, two hundred fourteen thousand, four hundred twenty-four".