322640245 has 8 divisors (see below), whose sum is σ = 387284184. Its totient is φ = 258034944.

The previous prime is 322640233. The next prime is 322640249. The reversal of 322640245 is 542046223.

It can be written as a sum of positive squares in 4 ways, for example, as 20958084 + 301682161 = 4578^2 + 17369^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-322640245 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (322640249) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13977 + ... + 28993.

It is an arithmetic number, because the mean of its divisors is an integer number (48410523).

Almost surely, 2^322640245 is an apocalyptic number.

It is an amenable number.

322640245 is a deficient number, since it is larger than the sum of its proper divisors (64643939).

322640245 is a wasteful number, since it uses less digits than its factorization.

322640245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19319.

The product of its (nonzero) digits is 11520, while the sum is 28.

The square root of 322640245 is about 17962.1893153368. The cubic root of 322640245 is about 685.8663767198.

Adding to 322640245 its reverse (542046223), we get a palindrome (864686468).

The spelling of 322640245 in words is "three hundred twenty-two million, six hundred forty thousand, two hundred forty-five".