23885971217 has 2 divisors, whose sum is σ = 23885971218. Its totient is φ = 23885971216.

The previous prime is 23885971189. The next prime is 23885971223. The reversal of 23885971217 is 71217958832.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16224645376 + 7661325841 = 127376^2 + 87529^2 .

It is a cyclic number.

It is not a de Polignac number, because 23885971217 - 2¹⁰ = 23885970193 is a prime.

It is a super-2 number, since 2×23885971217² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (23885971717) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11942985608 + 11942985609.

It is an arithmetic number, because the mean of its divisors is an integer number (11942985609).

Almost surely, 2^23885971217 is an apocalyptic number.

It is an amenable number.

23885971217 is a deficient number, since it is larger than the sum of its proper divisors (1).

23885971217 is an equidigital number, since it uses as much as digits as its factorization.

23885971217 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1693440, while the sum is 53.

The spelling of 23885971217 in words is "twenty-three billion, eight hundred eighty-five million, nine hundred seventy-one thousand, two hundred seventeen".