17215243553 has 2 divisors, whose sum is σ = 17215243554. Its totient is φ = 17215243552.

The previous prime is 17215243501. The next prime is 17215243603. The reversal of 17215243553 is 35534251271.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15235705489 + 1979538064 = 123433^2 + 44492^2 .

It is a cyclic number.

It is not a de Polignac number, because 17215243553 - 2³⁴ = 35374369 is a prime.

It is a super-2 number, since 2×17215243553² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (17215243753) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8607621776 + 8607621777.

It is an arithmetic number, because the mean of its divisors is an integer number (8607621777).

Almost surely, 2^17215243553 is an apocalyptic number.

It is an amenable number.

17215243553 is a deficient number, since it is larger than the sum of its proper divisors (1).

17215243553 is an equidigital number, since it uses as much as digits as its factorization.

17215243553 is an evil number, because the sum of its binary digits is even.

The product of its digits is 126000, while the sum is 38.

The spelling of 17215243553 in words is "seventeen billion, two hundred fifteen million, two hundred forty-three thousand, five hundred fifty-three".