322251997 has 2 divisors, whose sum is σ = 322251998. Its totient is φ = 322251996.

The previous prime is 322251991. The next prime is 322252013. The reversal of 322251997 is 799152223.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 161951076 + 160300921 = 12726^2 + 12661^2 .

It is an emirp because it is prime and its reverse (799152223) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 322251997 - 2¹⁹ = 321727709 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (322251991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 161125998 + 161125999.

It is an arithmetic number, because the mean of its divisors is an integer number (161125999).

Almost surely, 2^322251997 is an apocalyptic number.

It is an amenable number.

322251997 is a deficient number, since it is larger than the sum of its proper divisors (1).

322251997 is an equidigital number, since it uses as much as digits as its factorization.

322251997 is an evil number, because the sum of its binary digits is even.

The product of its digits is 68040, while the sum is 40.

The square root of 322251997 is about 17951.3786935711. The cubic root of 322251997 is about 685.5911546665.

The spelling of 322251997 in words is "three hundred twenty-two million, two hundred fifty-one thousand, nine hundred ninety-seven".