3521152421 has 16 divisors (see below), whose sum is σ = 3861043200. Its totient is φ = 3196263168.

The previous prime is 3521152417. The next prime is 3521152441. The reversal of 3521152421 is 1242511253.

It is a cyclic number.

It is not a de Polignac number, because 3521152421 - 2² = 3521152417 is a prime.

It is a super-2 number, since 2×3521152421² = 24797028743828322482, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3521152441) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 520700 + ... + 527418.

It is an arithmetic number, because the mean of its divisors is an integer number (241315200).

Almost surely, 2^3521152421 is an apocalyptic number.

It is an amenable number.

3521152421 is a deficient number, since it is larger than the sum of its proper divisors (339890779).

3521152421 is a wasteful number, since it uses less digits than its factorization.

3521152421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7828.

The product of its digits is 2400, while the sum is 26.

The square root of 3521152421 is about 59339.2991279809. The cubic root of 3521152421 is about 1521.3469738533.

Adding to 3521152421 its reverse (1242511253), we get a palindrome (4763663674).

The spelling of 3521152421 in words is "three billion, five hundred twenty-one million, one hundred fifty-two thousand, four hundred twenty-one".