3895231521 has 16 divisors (see below), whose sum is σ = 5245275200. Its totient is φ = 2571041088.

The previous prime is 3895231519. The next prime is 3895231523. The reversal of 3895231521 is 1251325983.

It is an interprime number because it is at equal distance from previous prime (3895231519) and next prime (3895231523).

It is not a de Polignac number, because 3895231521 - 2¹ = 3895231519 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 3895231521.

It is not an unprimeable number, because it can be changed into a prime (3895231523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 518490 + ... + 525948.

It is an arithmetic number, because the mean of its divisors is an integer number (327829700).

Almost surely, 2^3895231521 is an apocalyptic number.

It is an amenable number.

3895231521 is a deficient number, since it is larger than the sum of its proper divisors (1350043679).

3895231521 is a wasteful number, since it uses less digits than its factorization.

3895231521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9168.

The product of its digits is 64800, while the sum is 39.

The square root of 3895231521 is about 62411.7899198541. The cubic root of 3895231521 is about 1573.4191270915.

The spelling of 3895231521 in words is "three billion, eight hundred ninety-five million, two hundred thirty-one thousand, five hundred twenty-one".