10515421717 has 4 divisors (see below), whose sum is σ = 10530640096. Its totient is φ = 10500203340.

The previous prime is 10515421691. The next prime is 10515421747. The reversal of 10515421717 is 71712451501.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10515421717 is a prime.

It is a super-2 number, since 2×10515421717² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10515421747) 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, 7608153 + ... + 7609534.

It is an arithmetic number, because the mean of its divisors is an integer number (2632660024).

Almost surely, 2^10515421717 is an apocalyptic number.

It is an amenable number.

10515421717 is a deficient number, since it is larger than the sum of its proper divisors (15218379).

10515421717 is an equidigital number, since it uses as much as digits as its factorization.

10515421717 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15218378.

The product of its (nonzero) digits is 9800, while the sum is 34.

The spelling of 10515421717 in words is "ten billion, five hundred fifteen million, four hundred twenty-one thousand, seven hundred seventeen".