3996202521 has 4 divisors (see below), whose sum is σ = 5328270032. Its totient is φ = 2664135012.

The previous prime is 3996202519. The next prime is 3996202543. The reversal of 3996202521 is 1252026993.

3996202521 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 3996202521 - 2¹ = 3996202519 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 3996202521.

It is not an unprimeable number, because it can be changed into a prime (3996202571) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 666033751 + ... + 666033756.

It is an arithmetic number, because the mean of its divisors is an integer number (1332067508).

Almost surely, 2^3996202521 is an apocalyptic number.

It is an amenable number.

3996202521 is a deficient number, since it is larger than the sum of its proper divisors (1332067511).

3996202521 is a wasteful number, since it uses less digits than its factorization.

3996202521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1332067510.

The product of its (nonzero) digits is 58320, while the sum is 39.

The square root of 3996202521 is about 63215.5243670414. The cubic root of 3996202521 is about 1586.8985494011.

The spelling of 3996202521 in words is "three billion, nine hundred ninety-six million, two hundred two thousand, five hundred twenty-one".