2133316521 has 40 divisors (see below), whose sum is σ = 3647044544. Its totient is φ = 1217371680.

The previous prime is 2133316489. The next prime is 2133316571. The reversal of 2133316521 is 1256133312.

2133316521 is a `hidden beast` number, since 2 + 1 + 3 + 3 + 3 + 1 + 652 + 1 = 666.

It is not a de Polignac number, because 2133316521 - 2⁵ = 2133316489 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2133316571) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 498531 + ... + 502791.

Almost surely, 2^2133316521 is an apocalyptic number.

2133316521 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

2133316521 is a deficient number, since it is larger than the sum of its proper divisors (1513728023).

2133316521 is an equidigital number, since it uses as much as digits as its factorization.

2133316521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5163 (or 5154 counting only the distinct ones).

The product of its digits is 3240, while the sum is 27.

The square root of 2133316521 is about 46187.8395359644. The cubic root of 2133316521 is about 1287.3157977717.

Adding to 2133316521 its reverse (1256133312), we get a palindrome (3389449833).

The spelling of 2133316521 in words is "two billion, one hundred thirty-three million, three hundred sixteen thousand, five hundred twenty-one".