17212052261 has 2 divisors, whose sum is σ = 17212052262. Its totient is φ = 17212052260.

The previous prime is 17212052257. The next prime is 17212052267. The reversal of 17212052261 is 16225021271.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13694850625 + 3517201636 = 117025^2 + 59306^2 .

It is a cyclic number.

It is not a de Polignac number, because 17212052261 - 2² = 17212052257 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (17212052267) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8606026130 + 8606026131.

It is an arithmetic number, because the mean of its divisors is an integer number (8606026131).

Almost surely, 2^17212052261 is an apocalyptic number.

It is an amenable number.

17212052261 is a deficient number, since it is larger than the sum of its proper divisors (1).

17212052261 is an equidigital number, since it uses as much as digits as its factorization.

17212052261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3360, while the sum is 29.

The spelling of 17212052261 in words is "seventeen billion, two hundred twelve million, fifty-two thousand, two hundred sixty-one".