3521249505 has 24 divisors (see below), whose sum is σ = 6206952960. Its totient is φ = 1846167840.

The previous prime is 3521249449. The next prime is 3521249507. The reversal of 3521249505 is 5059421253.

It is a happy number.

It is not a de Polignac number, because 3521249505 - 2¹⁶ = 3521183969 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 3521249505.

It is not an unprimeable number, because it can be changed into a prime (3521249507) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 660481 + ... + 665790.

It is an arithmetic number, because the mean of its divisors is an integer number (258623040).

Almost surely, 2^3521249505 is an apocalyptic number.

It is an amenable number.

3521249505 is a deficient number, since it is larger than the sum of its proper divisors (2685703455).

3521249505 is a wasteful number, since it uses less digits than its factorization.

3521249505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1326341 (or 1326338 counting only the distinct ones).

The product of its (nonzero) digits is 54000, while the sum is 36.

The square root of 3521249505 is about 59340.1171636862. The cubic root of 3521249505 is about 1521.3609557428.

The spelling of 3521249505 in words is "three billion, five hundred twenty-one million, two hundred forty-nine thousand, five hundred five".