1322220197 has 4 divisors (see below), whose sum is σ = 1357955916. Its totient is φ = 1286484480.

The previous prime is 1322220173. The next prime is 1322220227. The reversal of 1322220197 is 7910222231.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7910222231 = 59183 ⋅133657.

It can be written as a sum of positive squares in 2 ways, for example, as 780308356 + 541911841 = 27934^2 + 23279^2 .

It is a cyclic number.

It is not a de Polignac number, because 1322220197 - 2¹⁶ = 1322154661 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 (1322220157) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17867804 + ... + 17867877.

It is an arithmetic number, because the mean of its divisors is an integer number (339488979).

Almost surely, 2^1322220197 is an apocalyptic number.

It is an amenable number.

1322220197 is a deficient number, since it is larger than the sum of its proper divisors (35735719).

1322220197 is an equidigital number, since it uses as much as digits as its factorization.

1322220197 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35735718.

The product of its (nonzero) digits is 3024, while the sum is 29.

The square root of 1322220197 is about 36362.3458676692. The cubic root of 1322220197 is about 1097.5759837251.

The spelling of 1322220197 in words is "one billion, three hundred twenty-two million, two hundred twenty thousand, one hundred ninety-seven".