1220323225 has 12 divisors (see below), whose sum is σ = 1650764880. Its totient is φ = 887507600.

The previous prime is 1220323201. The next prime is 1220323229. The reversal of 1220323225 is 5223230221.

It is not a de Polignac number, because 1220323225 - 2¹¹ = 1220321177 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1220323196 and 1220323205.

It is not an unprimeable number, because it can be changed into a prime (1220323229) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2218495 + ... + 2219044.

It is an arithmetic number, because the mean of its divisors is an integer number (137563740).

Almost surely, 2^1220323225 is an apocalyptic number.

It is an amenable number.

1220323225 is a deficient number, since it is larger than the sum of its proper divisors (430441655).

1220323225 is a wasteful number, since it uses less digits than its factorization.

1220323225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4437560 (or 4437555 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 22.

The square root of 1220323225 is about 34933.1250391373. The cubic root of 1220323225 is about 1068.6240867132.

Adding to 1220323225 its reverse (5223230221), we get a palindrome (6443553446).

The spelling of 1220323225 in words is "one billion, two hundred twenty million, three hundred twenty-three thousand, two hundred twenty-five".