23285539217 has 4 divisors (see below), whose sum is σ = 24655276836. Its totient is φ = 21915801600.

The previous prime is 23285539213. The next prime is 23285539231. The reversal of 23285539217 is 71293558232.

It is a Cunningham number, because it is equal to 152596²+1.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 18129006736 + 5156532481 = 134644^2 + 71809^2 .

It is not a de Polignac number, because 23285539217 - 2² = 23285539213 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23285539213) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 684868784 + ... + 684868817.

It is an arithmetic number, because the mean of its divisors is an integer number (6163819209).

Almost surely, 2^23285539217 is an apocalyptic number.

It is an amenable number.

23285539217 is a deficient number, since it is larger than the sum of its proper divisors (1369737619).

23285539217 is a wasteful number, since it uses less digits than its factorization.

23285539217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1369737618.

The product of its digits is 907200, while the sum is 47.

The spelling of 23285539217 in words is "twenty-three billion, two hundred eighty-five million, five hundred thirty-nine thousand, two hundred seventeen".