1716521517 has 16 divisors (see below), whose sum is σ = 2584685760. Its totient is φ = 1125586800.

The previous prime is 1716521473. The next prime is 1716521531. The reversal of 1716521517 is 7151256171.

It is a happy number.

It is not a de Polignac number, because 1716521517 - 2¹⁶ = 1716455981 is a prime.

It is a super-2 number, since 2×1716521517² = 5892892236647962578, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1716521557) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 519459 + ... + 522752.

It is an arithmetic number, because the mean of its divisors is an integer number (161542860).

Almost surely, 2^1716521517 is an apocalyptic number.

It is an amenable number.

1716521517 is a deficient number, since it is larger than the sum of its proper divisors (868164243).

1716521517 is a wasteful number, since it uses less digits than its factorization.

1716521517 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1042281 (or 1042275 counting only the distinct ones).

The product of its digits is 14700, while the sum is 36.

The square root of 1716521517 is about 41430.9246457281. The cubic root of 1716521517 is about 1197.3370386520.

Adding to 1716521517 its reverse (7151256171), we get a palindrome (8867777688).

The spelling of 1716521517 in words is "one billion, seven hundred sixteen million, five hundred twenty-one thousand, five hundred seventeen".