3521403405 has 72 divisors (see below), whose sum is σ = 6757280712. Its totient is φ = 1686375936.

The previous prime is 3521403383. The next prime is 3521403407. The reversal of 3521403405 is 5043041253.

It can be written as a sum of positive squares in 12 ways, for example, as 158911236 + 3362492169 = 12606^2 + 57987^2 .

It is not a de Polignac number, because 3521403405 - 2⁵ = 3521403373 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3521403407) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 798667 + ... + 803063.

It is an arithmetic number, because the mean of its divisors is an integer number (93851121).

Almost surely, 2^3521403405 is an apocalyptic number.

It is an amenable number.

3521403405 is a deficient number, since it is larger than the sum of its proper divisors (3235877307).

3521403405 is a wasteful number, since it uses less digits than its factorization.

3521403405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4495 (or 4455 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 27.

The square root of 3521403405 is about 59341.4139113655. The cubic root of 3521403405 is about 1521.3831196594.

Adding to 3521403405 its reverse (5043041253), we get a palindrome (8564444658).

The spelling of 3521403405 in words is "three billion, five hundred twenty-one million, four hundred three thousand, four hundred five".