17221255061 has 4 divisors (see below), whose sum is σ = 17513140800. Its totient is φ = 16929369324.

The previous prime is 17221255027. The next prime is 17221255069. The reversal of 17221255061 is 16055212271.

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, and also an emirpimes, since its reverse is a distinct semiprime: 16055212271 = 7 ⋅2293601753.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-17221255061 is a prime.

It is a super-2 number, since 2×17221255061² (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 (17221255069) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 145942781 + ... + 145942898.

It is an arithmetic number, because the mean of its divisors is an integer number (4378285200).

Almost surely, 2^17221255061 is an apocalyptic number.

It is an amenable number.

17221255061 is a deficient number, since it is larger than the sum of its proper divisors (291885739).

17221255061 is an equidigital number, since it uses as much as digits as its factorization.

17221255061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 291885738.

The product of its (nonzero) digits is 8400, while the sum is 32.

The spelling of 17221255061 in words is "seventeen billion, two hundred twenty-one million, two hundred fifty-five thousand, sixty-one".