23216519321 has 2 divisors, whose sum is σ = 23216519322. Its totient is φ = 23216519320.

The previous prime is 23216519317. The next prime is 23216519363. The reversal of 23216519321 is 12391561232.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22181932096 + 1034587225 = 148936^2 + 32165^2 .

It is a cyclic number.

It is not a de Polignac number, because 23216519321 - 2² = 23216519317 is a prime.

It is not a weakly prime, because it can be changed into another prime (23216510321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11608259660 + 11608259661.

It is an arithmetic number, because the mean of its divisors is an integer number (11608259661).

Almost surely, 2^23216519321 is an apocalyptic number.

It is an amenable number.

23216519321 is a deficient number, since it is larger than the sum of its proper divisors (1).

23216519321 is an equidigital number, since it uses as much as digits as its factorization.

23216519321 is an evil number, because the sum of its binary digits is even.

The product of its digits is 19440, while the sum is 35.

The spelling of 23216519321 in words is "twenty-three billion, two hundred sixteen million, five hundred nineteen thousand, three hundred twenty-one".