2321521564 has 24 divisors (see below), whose sum is σ = 4346002080. Its totient is φ = 1081214976.

The previous prime is 2321521549. The next prime is 2321521589. The reversal of 2321521564 is 4651251232.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 169384 + ... + 182575.

It is an arithmetic number, because the mean of its divisors is an integer number (181083420).

Almost surely, 2^2321521564 is an apocalyptic number.

It is an amenable number.

2321521564 is a deficient number, since it is larger than the sum of its proper divisors (2024480516).

2321521564 is a wasteful number, since it uses less digits than its factorization.

2321521564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 352077 (or 352075 counting only the distinct ones).

The product of its digits is 14400, while the sum is 31.

The square root of 2321521564 is about 48182.1706028278. The cubic root of 2321521564 is about 1324.1105342133.

Adding to 2321521564 its reverse (4651251232), we get a palindrome (6972772796).

The spelling of 2321521564 in words is "two billion, three hundred twenty-one million, five hundred twenty-one thousand, five hundred sixty-four".