2331663521 has 16 divisors (see below), whose sum is σ = 2615929728. Its totient is φ = 2059603200.

The previous prime is 2331663491. The next prime is 2331663541. The reversal of 2331663521 is 1253661332.

2331663521 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 2331663521 - 2¹⁸ = 2331401377 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2331663541) 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, 331481 + ... + 338441.

It is an arithmetic number, because the mean of its divisors is an integer number (163495608).

Almost surely, 2^2331663521 is an apocalyptic number.

It is an amenable number.

2331663521 is a deficient number, since it is larger than the sum of its proper divisors (284266207).

2331663521 is a wasteful number, since it uses less digits than its factorization.

2331663521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7832.

The product of its digits is 19440, while the sum is 32.

The square root of 2331663521 is about 48287.3018608412. The cubic root of 2331663521 is about 1326.0359328994.

The spelling of 2331663521 in words is "two billion, three hundred thirty-one million, six hundred sixty-three thousand, five hundred twenty-one".