2188870517 has 2 divisors, whose sum is σ = 2188870518. Its totient is φ = 2188870516.

The previous prime is 2188870469. The next prime is 2188870553. The reversal of 2188870517 is 7150788812.

2188870517 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1249693201 + 939177316 = 35351^2 + 30646^2 .

It is a cyclic number.

It is not a de Polignac number, because 2188870517 - 2⁸ = 2188870261 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2188870577) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1094435258 + 1094435259.

It is an arithmetic number, because the mean of its divisors is an integer number (1094435259).

Almost surely, 2^2188870517 is an apocalyptic number.

It is an amenable number.

2188870517 is a deficient number, since it is larger than the sum of its proper divisors (1).

2188870517 is an equidigital number, since it uses as much as digits as its factorization.

2188870517 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 250880, while the sum is 47.

The square root of 2188870517 is about 46785.3664835491. The cubic root of 2188870517 is about 1298.3945698728.

The spelling of 2188870517 in words is "two billion, one hundred eighty-eight million, eight hundred seventy thousand, five hundred seventeen".