21710565341 has 2 divisors, whose sum is σ = 21710565342. Its totient is φ = 21710565340.

The previous prime is 21710565323. The next prime is 21710565379. The reversal of 21710565341 is 14356501712.

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., 17617252900 + 4093312441 = 132730^2 + 63979^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21710565341 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21710565301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10855282670 + 10855282671.

It is an arithmetic number, because the mean of its divisors is an integer number (10855282671).

Almost surely, 2^21710565341 is an apocalyptic number.

It is an amenable number.

21710565341 is a deficient number, since it is larger than the sum of its proper divisors (1).

21710565341 is an equidigital number, since it uses as much as digits as its factorization.

21710565341 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25200, while the sum is 35.

The spelling of 21710565341 in words is "twenty-one billion, seven hundred ten million, five hundred sixty-five thousand, three hundred forty-one".