321052681 has 2 divisors, whose sum is σ = 321052682. Its totient is φ = 321052680.

The previous prime is 321052679. The next prime is 321052687. The reversal of 321052681 is 186250123.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 247779081 + 73273600 = 15741^2 + 8560^2 .

It is an emirp because it is prime and its reverse (186250123) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 321052681 - 2¹ = 321052679 is a prime.

It is a super-2 number, since 2×321052681² = 206149647954575522, which contains 22 as substring.

Together with 321052679, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (321052687) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160526340 + 160526341.

It is an arithmetic number, because the mean of its divisors is an integer number (160526341).

Almost surely, 2^321052681 is an apocalyptic number.

It is an amenable number.

321052681 is a deficient number, since it is larger than the sum of its proper divisors (1).

321052681 is an equidigital number, since it uses as much as digits as its factorization.

321052681 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2880, while the sum is 28.

The square root of 321052681 is about 17917.9429901984. The cubic root of 321052681 is about 684.7395823987.

The spelling of 321052681 in words is "three hundred twenty-one million, fifty-two thousand, six hundred eighty-one".