1320172222 has 4 divisors (see below), whose sum is σ = 1980258336. Its totient is φ = 660086110.

The previous prime is 1320172181. The next prime is 1320172229. The reversal of 1320172222 is 2222710231.

It is a semiprime because it is the product of two primes.

It is a junction number, because it is equal to n+sod(n) for n = 1320172193 and 1320172202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1320172229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 330043054 + ... + 330043057.

It is an arithmetic number, because the mean of its divisors is an integer number (495064584).

Almost surely, 2^1320172222 is an apocalyptic number.

1320172222 is a deficient number, since it is larger than the sum of its proper divisors (660086114).

1320172222 is an equidigital number, since it uses as much as digits as its factorization.

1320172222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 660086113.

The product of its (nonzero) digits is 672, while the sum is 22.

The square root of 1320172222 is about 36334.1742991361. The cubic root of 1320172222 is about 1097.0090157025.

Adding to 1320172222 its reverse (2222710231), we get a palindrome (3542882453).

The spelling of 1320172222 in words is "one billion, three hundred twenty million, one hundred seventy-two thousand, two hundred twenty-two".